Make payments with PayPal - it's fast, free and secure! registry | CVN on Facebook | tech | news | email login Make payments with PayPal - it's fast, free and secure!


Welcome to CVN - Your Panther platform headquarters!


Custom Search


Page 1 of 5 1 2 3 4 5 >
Topic Options
#1432941 - 03/25/08 06:35 PM Gear Swap: Did I bite off too much, went with 4.30
Al Offline
Rookie

Registered: 12/27/07
Posts: 76
Loc: So Cal
My 01 P71 was a slug, I think it had some kind of Highway option or something. 2.73's were in it. I had the 4.30's installed by a proffesional so I am not worried about them wearing out prematurely. What I am worried about is my transmission, however, after about 250 miles my O/D Off light started to blink. I like the acceleration the 4.30's provide, but is it going to tear apart my car? I get a noise around 85mph, but attribute that to brand new gears, hopefully after a week or two that will go away, or else I will be taking it back for service under warranty. Anyhow, I would like to ask for some opinions from the old timers about tall gears in these CV's.
Thanks,
Al...
_________________________
If you don't know where your going, how do you know when you get there...

03 P71 CNG VIC
05 Mustang GT Convertible (Told the wife it was for her)
95 Bronco
96 Winnebago Adventurer
1373 Cubic Inches of FORD at my command

Top
Links
#1432946 - 03/25/08 06:40 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: Al]
kustomizingkid Offline
Poobah

Registered: 11/18/06
Posts: 5070
Loc: Minnesota
Did you get a tune when you got the new gears? It is recomended to get a tune if you go more than 2 steps, 2.73, 3.08, 3.27, 3.55, 3.73, 4.10, 4.30.... you went a couple more than two so I would have to say a tune could really help, your car is a bit confused right now.


Edited by kustomizingkid (03/25/08 06:40 PM)
_________________________
2000 CVPI 121,000 miles

1998 Mark VIII Collector's Edition 110,000 miles


Top
#1432964 - 03/25/08 06:53 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: kustomizingkid]
Dan The Vic Man Offline
Poobah

Registered: 11/22/03
Posts: 9890
Loc: Coon Rapids MN
Ah the noise you are hearing is driveshaft noise,you could try and get a MMC driveshaft from a 99 cvpi to try and make it not so noisey, i would have gone with 4:10s the highest gear. Usually when the o/d light is flashing it means you have a tranny code, could be a smoked od band, a faulty electrical part, many things.
_________________________
2012 Ford F150 Ecoboost

1998 mercury Grand Marquis, 58k miles slower than a turtle stock as stock gets

RIP 99 CVPI

Top
#1432982 - 03/25/08 07:09 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: Dan The Vic Man]
Quickvic30 Offline
Just watchin
Grand Poobah

Registered: 02/24/05
Posts: 10922
Loc: Minneapolis, MN
4.30's holy cows \:D

You might want to think about the forced lube tailshaft mod also. i can't imagine what that would be like with 4.30's \:\)
_________________________



Top
#1432992 - 03/25/08 07:25 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: Quickvic30]
tackleberry Offline
Poobah

Registered: 03/04/07
Posts: 7114
Loc: Las Vegas
say goodbye to gas mileage lol
_________________________
ITS NOT A PANTHER, AND IT HAS A CABIN AIR FILTER!!!

Top
#1432999 - 03/25/08 07:32 PM Re: Gear Swap: Did I bite off too much, went with [Re: tackleberry]
P71_CrownVic Offline
Over the Hill

Registered: 11/19/04
Posts: 4169
4.30???

You can probably do a brake stand just by dropping it in drive and stepping on the brake.
_________________________
I can't help my low intelligence.
-Moby Vic

"I rather be hated for telling the truth, than loved for telling a lie".

Top
#1433014 - 03/25/08 07:54 PM Re: Gear Swap: Did I bite off too much, went with [Re: P71_CrownVic]
dRock96Marquis Offline


Posting Addict

Registered: 02/22/05
Posts: 24393
Loc: Maryland
Go to autozone and have it scanned (free) and post up the code.



You will need a relfash with that much change in axle ratio.

3.27 is standard for CVPI. Your real axle may have been swapped in favor of a normal retail 2.73 axle because of a problem of better mileage.



The noise you hear at 85mph is probably your drive shaft. The rotational speed traveling that fast with 4.30s must be VERY high. Try to keep speeds below 90mph, and cruising speed below 75. Look into forced lube modification and an AMMC driveshaft IS A MUST.
_________________________
-Derek
-Panther info & FAQs-



Former owner of a Grand Marquis with a few mods, Grand Marquis "LSE S/C"

Top
#1433022 - 03/25/08 08:02 PM Re: Gear Swap: Did I bite off too much, went with [Re: dRock96Marquis]
TechnoWeenie Offline
Banned
Posting Addict

Registered: 10/02/04
Posts: 22857
Loc: The perimeter
I ditched 3.27's for 2.73's, even with only one 'jump' the shifting is noticeably off, I can't even imagine what yours are...
_________________________

Top
#1433115 - 03/25/08 09:09 PM Re: Gear Swap: Did I bite off too much, went with [Re: TechnoWeenie]
SilverSport Offline
Climber

Registered: 09/22/03
Posts: 817
Loc: Lower Hudson Valley, NY
If I were you I would unistall those gears ASAP. Our SOHC engines do not favor those very high gears, they are much more suited to the DOHC with a stick (Cobra Mustangs). I think most Marauder guys go with 4.10's and even those are too high for the SOHC motors. I think the general consensous is to gear no higher than 3.73's for street driven Vics and even then I would not put that much gear in a stock motor. As the others have mentioned, a custom tune for the trans is mandatory for a major gear change.
_________________________
04 Crown Vic LX Sport

Infinity Reference 6x8's/XM Radio/bc4ever dead pedal/BH1976 headlamp harness/Phillips Xtreme Power 9007
Addco Sway Bars/KYB PI struts/Moog PI front springs/Gabriel PI shocks/Mustang 17x8 split spoke

"Simon Bar Sinister"


Top
#1433130 - 03/25/08 09:27 PM Re: Gear Swap: Did I bite off too much, went with [Re: SilverSport]
kustomizingkid Offline
Poobah

Registered: 11/18/06
Posts: 5070
Loc: Minnesota
I think that much gear would be awesome, if you were willing to deal with the gas mileage and cruise rpms. He just needs a good tune and all will be well again.
_________________________
2000 CVPI 121,000 miles

1998 Mark VIII Collector's Edition 110,000 miles


Top
#1433328 - 03/26/08 12:10 AM Re: Gear Swap: Did I bite off too much, went with [Re: kustomizingkid]
PantherP73 Offline

Relocated Yankee
Poobah

Registered: 06/19/05
Posts: 5341
Loc: Greenville, South Carolina
I would imagine he's over 2300 rpm or so with those gears...

Just out of curiosity, why would you go so high? That's hard on the engine and probably everything else.
_________________________
2015 Kia Forte
2016 Hyundai Elantra
Someday I will have real cars again.

Top
#1433377 - 03/26/08 01:05 AM Re: Gear Swap: Did I bite off too much, went with [Re: PantherP73]
jaybird Offline
Over the Hill

Registered: 11/05/06
Posts: 1413
Loc: San Jose Ca.
man thats quick off the line huh? i have 3.55 stck and i wonder what 3.73 were like 4.30 wow must boogie up to 60 then it gets loud? It may harm your engine w/o said tune ASAP
sounds like fun though..Enjoy & post a burnout Pic/Video
_________________________
2000 CV LX HPP Loaded 3.55 RAR SOLD @ 191k MILES / Modified K&N CAI FIPK w/ Lower Inlet / Magnaflow 12255 Mufflers / KYB Gas A Just Shocks / Rear Coil Spring Conversion / 18" Mustang Fanblades! 1.5" Hubcentric Spacers / Michelin Pilot HXMX M4 235/50/18 Tires / Hawk HPS Brake Pads F&R / SilverStar Light Bulbs



Top
#1433383 - 03/26/08 01:15 AM Re: Gear Swap: Did I bite off too much, went with [Re: jaybird]
SteelCityMarquis Offline
Fomerly 93MGMGS
Over the Hill

Registered: 12/22/07
Posts: 1940
Loc: Pittsburgh Area
Holy Jump!!!! Better get that forced lube, AMMX, and a tune ASAP!

If you decide to keep definitly post a pic/video!
_________________________

2002 Mercury Grand Marquis LS. - 80k GF's Daily Driver
1991 Honda Accord LX Wagon 5 Speed - 258k My Daily Driver
1980 Oldsmobile Delta 88 Royal Diesel - 96k

Top
#1433384 - 03/26/08 01:18 AM Re: Gear Swap: Did I bite off too much, went with [Re: jaybird]
96bluvic Offline
Over the Hill

Registered: 10/27/06
Posts: 3054
Loc: southeastern WI
its not gona harm the engine, just get a proper tune, the MMC driveshaft and maybe a loop.
did you correct the speedo.
I bet it feels nice, these cars need all the gearing from a stop, 4.30's arent high enough....
_________________________
Back in with an 07 CVPI

Top
#1433544 - 03/26/08 10:34 AM Re: Gear Swap: Did I bite off too much, went with [Re: 96bluvic]
Allen Maty Offline
Poobah

Registered: 06/27/04
Posts: 6560
Loc: Southern California
You should get a scangaugeII and see what RPM your driveshaft is spinning. In fact does anyone know what the resonate frequency (in RPM) of a steel or aluminum drivshaft is?

If you knew then you could read it right off your scangauge and avoid that speed.
_________________________
'99 Crown Victoria LX HPP w/ Digi-Dash 11/2001-12/2011 Sold! Still on road with 219K miles as of 1/15
2012 Mustang GT Premium 5.0 6 Speed Man /w 3.73 LSD. wink

For Sale: Maurader Air Intake, Zip tube & 80mm MAF with matching BOC Custom Tune Chip and ECU computer (will fit '99-'00).


Top
#1433625 - 03/26/08 01:23 PM Re: Gear Swap: Did I bite off too much, went with [Re: Allen Maty]
whdahel Offline
Climber

Registered: 02/09/05
Posts: 896
Loc: North Bloomfield, Ohio
Now here is a guy that isn't afraid of the price of gas and the power of a V8. Thats awsome!

Sounds like all you really need is a tune a Drive shaft and your in business.


how low of gears would the aluminum D/S be good to?
_________________________
02 GMQ HPP 88k miles
4th panther I have owned
no mods yet.....
My Garage: www.supermotors.net/8297

Loud pipes save lives!

Top
#1433635 - 03/26/08 01:38 PM Re: Gear Swap: Did I bite off too much, went with [Re: whdahel]
dRock96Marquis Offline


Posting Addict

Registered: 02/22/05
Posts: 24393
Loc: Maryland
 Originally Posted By: whdahel
Now here is a guy that isn't afraid of the price of gas and the power of a V8. Thats awsome!

Sounds like all you really need is a tune a Drive shaft and your in business.


how low of gears would the aluminum D/S be good to?


I'd only go to 3.73, or 4.10 if you keep speeds highway or lower.
_________________________
-Derek
-Panther info & FAQs-



Former owner of a Grand Marquis with a few mods, Grand Marquis "LSE S/C"

Top
#1433772 - 03/26/08 04:50 PM Re: Gear Swap: Did I bite off too much, went with [Re: dRock96Marquis]
Mileaway Offline
Posting Addict

Registered: 10/06/05
Posts: 16831
Loc: Sacto. Calif.
Whiplash disclaimer come with 4.30s?
_________________________
2000 P71 Interceptor orig. equip.near mint parchment int.& carpet 155,000 mi. 3.55 rear .











Top
#1433796 - 03/26/08 05:21 PM Re: Gear Swap: Did I bite off too much, went with [Re: Mileaway]
natedog Offline
Over the Hill

Registered: 08/07/07
Posts: 2715
Loc: Bowie, MD
Wow.

2.73's to 4.30's, that's quite an impressive leap.
_________________________
Absurd signature chopped.
Read the rules.

Top
#1433846 - 03/26/08 06:13 PM Re: Gear Swap: Did I bite off too much, went with [Re: natedog]
REAL4WD Offline
Over the Hill

Registered: 03/23/08
Posts: 4110
Loc: Glendale, CA
I would sure say. I have 3.55s and im worried bout gas prices. haha. tell me how the 4.30 gears work. eventually i might swap my gears.
_________________________

04 Crown Victoria LX Sport
95 AM General Hummer

Top
#1433852 - 03/26/08 06:23 PM Re: Gear Swap: Did I bite off too much, went with [Re: natedog]
P71CVMAN Offline
Over the Hill

Registered: 07/09/07
Posts: 4840
Loc: wIScONSiN
WOW \:D I went from 3.27s to 3.73s and I needed a tune as the tranny just didn't feel the same. My 3.73s are at 2200ish @ 60MPH. I thought I had no regard for the cost of gas when I went with my 3.73s and a 93 octane tune!
_________________________
Need new ride!!! Old ride: '01 Vomit Comet w/128K miles!
Best 1/4 mile pass: 14.774 @ 94.09 w/2.256 60' time!

Exhaust/dragstrip videos

Top
#1433871 - 03/26/08 06:47 PM Re: Gear Swap: Did I bite off too much, went with [Re: whdahel]
JWhittaker Offline
Climber

Registered: 09/21/01
Posts: 986
Loc: Seekonk, Ma
 Originally Posted By: whdahel
Now here is a guy that isn't afraid of the price of gas and the power of a V8. Thats awsome!

Sounds like all you really need is a tune a Drive shaft and your in business.


how low of gears would the aluminum D/S be good to?


Excellent, seconded! By the way does he have the lowest gear on CVN, I can't recall a lower gear in someone's car?
_________________________
2002 CV LX Sport
Speed Bleeders installed with the new brakes!10/07-brakes 85K at the time
http://www.flickr.com/photos/[email protected]/2382004080/

Top
#1433916 - 03/26/08 07:44 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: Al]
observer Offline
Over the Hill

Registered: 01/07/02
Posts: 3883
very interesting ratio

what rpms are you hitting at various mphs

you are geared lower than many 1 ton trucks
_________________________
1997 P71 145K miles

Top
#1433932 - 03/26/08 07:57 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: observer]
95merckid Offline
Member

Registered: 09/20/06
Posts: 284
Loc: wichita
he's got lower gears than a OTR Truck they only come with 4.11 altho id like to see a vic with 4.56 gears
_________________________

Top
#1434068 - 03/26/08 10:46 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: 95merckid]
autotech57103 Offline
Rookie

Registered: 03/10/07
Posts: 88
Loc: Sioux Falls, SD
4.30 is a CV is insane. They would be good for running 1/4 miles and if you wanted to pull something the size of a mobile home. 4.10 in a pickup are more reasonable because they have a taller tire thus more mph per rpm of the axleshaft. I useto drive a 89 F250 without overdrive and it would turn 3000 rpms at 60mph so the 4.30 ratio in the CV would be even worse. So ballpark rpm of the driveshaft at 85 would be in the neighborhood of 4500. With a .70 OD ratio that would put the engine rpm a little over 3100. Hope you add some protection for yourself from the driveshaft. It will be a murder weapon when it flys apart and goes thru the floor and out the roof.

Top
#1434110 - 03/26/08 11:20 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: autotech57103]
MountainDewSVT Offline
Rookie

Registered: 03/05/08
Posts: 78
Seriously people, is the driveshaft that big of a problem on crown vics? I don't understand why it would be. I've pushed my Cobra to 160mph several times and it holds up fine, even at 5500rpm in 4th (which is about 120 if I remember correctly). Seriously, is there something I'm missing??
_________________________

Top
#1434113 - 03/26/08 11:21 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: MountainDewSVT]
Quickvic30 Offline
Just watchin
Grand Poobah

Registered: 02/24/05
Posts: 10922
Loc: Minneapolis, MN
YES it's about 2 feet longer than a stang shaft.
_________________________



Top
#1434123 - 03/26/08 11:27 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: Quickvic30]
MountainDewSVT Offline
Rookie

Registered: 03/05/08
Posts: 78
 Originally Posted By: Quickvic30
YES it's about 2 feet longer than a stang shaft.


Which is what I assume causes flexing at higher RPMs?
_________________________

Top
#1434134 - 03/26/08 11:35 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: MountainDewSVT]
Quickvic30 Offline
Just watchin
Grand Poobah

Registered: 02/24/05
Posts: 10922
Loc: Minneapolis, MN
Yes sir \:\)
_________________________



Top
#1434173 - 03/27/08 12:10 AM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: MountainDewSVT]
Big_Bad_Joe Offline

Poobah

Registered: 12/12/01
Posts: 8468
Loc: Rochester NY
 Originally Posted By: MountainDewSVT
Seriously people, is the driveshaft that big of a problem on crown vics? I don't understand why it would be. I've pushed my Cobra to 160mph several times and it holds up fine, even at 5500rpm in 4th (which is about 120 if I remember correctly). Seriously, is there something I'm missing??


yup this aint no mustang.. so get those thoughts out of your head...

as far as pulling the quarter mile.. no way he will pull those gears on a stock motor...

he hasnt got enough motor
_________________________
2006 LX with HPPBlue, Light Camel Interior,Magnaflow Exhaust,PI Zip Tube
Underdrives from ADTR.net
Pioneer AVIC X930BT Nav system, JL xD400/4amp, JL Speakers, Audiovox backup camera
Given to DG in Ohio

2013 Ford Expedition Limited EL, Pearl White

2000 HPP RESURECTION RIP 8/17/2012 died in Dayton OH

Top
#1434175 - 03/27/08 12:14 AM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: Big_Bad_Joe]
Bobert2647 Offline
Former Vic Owner
Posting Addict

Registered: 09/16/04
Posts: 21245
Loc: West TN
4.30's dayum, little extreme, don't you think. About 2900rpm's at 75mph. Yea I'd back down to 3.27's of 3.55's

If you do a lot of highway, than 3.27's should offer a better balance.

Top
#1434182 - 03/27/08 12:18 AM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: Big_Bad_Joe]
BigJon Offline

Grand Poobah

Registered: 06/30/02
Posts: 11796
Loc: Virginia
good point joe. to have the ideal setup, you should match the gearing to engine. right now my 3.55s are just about ideal. once i go to a pi intake with my other mods, something more aggressive(though slightly) will be optimal.

although, i would love to feel what those 4.30s are like, lol. \:\)
_________________________
-Current:
2001 Crown Victoria P74

-Gone, but not forgotten:
1988 Mercury Grand Marquis
1994 Ford Crown Victoria
2000 Ford Crown Victoria HPP
2004 Ford Crown Victoria LX Sport
2004 Mercury Grand Marquis

Top
#1434275 - 03/27/08 04:28 AM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: BigJon]
REAL4WD Offline
Over the Hill

Registered: 03/23/08
Posts: 4110
Loc: Glendale, CA
If i do a PI intake with a new plenum and 70mm throttle body with a short ram intake fed by a CAI Ram Air plus shorty headers and a custom exhaustwould my stock 3.55 Gears be fine? I'm going to switch to posi if that makes a difference.
Thanks
_________________________

04 Crown Victoria LX Sport
95 AM General Hummer

Top
#1434331 - 03/27/08 07:57 AM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: REAL4WD]
BigJon Offline

Grand Poobah

Registered: 06/30/02
Posts: 11796
Loc: Virginia
your 3.55s will be fine. definitely get the trac-lok(posi), you will love it.
_________________________
-Current:
2001 Crown Victoria P74

-Gone, but not forgotten:
1988 Mercury Grand Marquis
1994 Ford Crown Victoria
2000 Ford Crown Victoria HPP
2004 Ford Crown Victoria LX Sport
2004 Mercury Grand Marquis

Top
#1434339 - 03/27/08 08:12 AM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: BigJon]
98VicP71 Offline
[email protected]
Grand Poobah

Registered: 03/28/06
Posts: 12731
Loc: ATL
you need a drive shaft loops most def. I would also do the forced lube mod and try and find you a MMC driveshaft.
_________________________
1993 Lincoln Town Car 150k+ - RIP 5/10/2011
1998 Ford Crown Victoria P71 - RIP 12/25/2006
2001 Ford Crown Victoria P71(Count blackula) 297k+ - Ummmmmm evil

Top
#1434664 - 03/27/08 04:22 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: Big_Bad_Joe]
Bigcarlover Offline
n00b

Registered: 03/04/08
Posts: 36
Loc: SC
 Originally Posted By: Big_Bad_Joe

as far as pulling the quarter mile.. no way he will pull those gears on a stock motor...

he hasnt got enough motor



Can you please explain what you mean here?

Top
#1435006 - 03/27/08 09:43 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: Bigcarlover]
autotech57103 Offline
Rookie

Registered: 03/10/07
Posts: 88
Loc: Sioux Falls, SD
Suppose if you are delivering pizza in a neighborhood that rarely sees hiway those gears would be ok, lol

Top
#1435031 - 03/27/08 10:02 PM Re: Gear Swap: Did I bite off too much, went with [Re: Bigcarlover]
BigJon Offline

Grand Poobah

Registered: 06/30/02
Posts: 11796
Loc: Virginia
 Originally Posted By: Bigcarlover
 Originally Posted By: Big_Bad_Joe

as far as pulling the quarter mile.. no way he will pull those gears on a stock motor...

he hasnt got enough motor



Can you please explain what you mean here?


in layman's terms, you need more hp to be truly beneficial in the 1/4 mile.

steeper gears help with tq multiplication. once the gearing is 'used' you need the hp to take over. you do not have enough.
_________________________
-Current:
2001 Crown Victoria P74

-Gone, but not forgotten:
1988 Mercury Grand Marquis
1994 Ford Crown Victoria
2000 Ford Crown Victoria HPP
2004 Ford Crown Victoria LX Sport
2004 Mercury Grand Marquis

Top
#1435090 - 03/27/08 10:45 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: Al]
Georges93LX Offline

Over the Hill

Registered: 10/07/03
Posts: 1887
Loc: Owensboro, Ky.
 Originally Posted By: Al
My 01 P71 was a slug, I think it had some kind of Highway option or something. 2.73's were in it. I had the 4.30's installed by a proffesional so I am not worried about them wearing out prematurely. What I am worried about is my transmission, however, after about 250 miles my O/D Off light started to blink. I like the acceleration the 4.30's provide, but is it going to tear apart my car? I get a noise around 85mph, but attribute that to brand new gears, hopefully after a week or two that will go away, or else I will be taking it back for service under warranty. Anyhow, I would like to ask for some opinions from the old timers about tall gears in these CV's.
Thanks,
Al...

Just an old timers opinion.
_________________________
1993 Crown Victoria LX. 5.4L Supercharged/6-Speed. SOLD. Black '03 Marauder 300a. SOLD.
If I gave a crap about gas mileage I would own a bicycle. It's time to start shopping.


Top
#1435249 - 03/28/08 07:13 AM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: 98VicP71]
REAL4WD Offline
Over the Hill

Registered: 03/23/08
Posts: 4110
Loc: Glendale, CA
 Originally Posted By: BigJon
your 3.55s will be fine. definitely get the trac-lok(posi), you will love it.


Thanks. Is the trac-lok hard to install?

 Originally Posted By: 98VicP71
you need a drive shaft loops most def. I would also do the forced lube mod and try and find you a MMC driveshaft.


and i believe a already hav a mmc driveshaft due to the fact i own a CVPI.
_________________________

04 Crown Victoria LX Sport
95 AM General Hummer

Top
#1435252 - 03/28/08 07:19 AM Re: Gear Swap: Did I bite off too much, went with [Re: REAL4WD]
98VicP71 Offline
[email protected]
Grand Poobah

Registered: 03/28/06
Posts: 12731
Loc: ATL
 Originally Posted By: AEQUITAS_VERITAS
 Originally Posted By: BigJon
your 3.55s will be fine. definitely get the trac-lok(posi), you will love it.


Thanks. Is the trac-lok hard to install?

 Originally Posted By: 98VicP71
you need a drive shaft loops most def. I would also do the forced lube mod and try and find you a MMC driveshaft.


and i believe a already hav a mmc driveshaft due to the fact i own a CVPI.


you will want to physically check your DS to make sure it is MMC as it was only an option the aluminum DS was standard on all CVPIs.

Track lock install requires the entire rear end to be torn down and rebuilt from what I understand so it would be something you may want a shop to install. Don't quote me on that but that is what I understand anyway.
_________________________
1993 Lincoln Town Car 150k+ - RIP 5/10/2011
1998 Ford Crown Victoria P71 - RIP 12/25/2006
2001 Ford Crown Victoria P71(Count blackula) 297k+ - Ummmmmm evil

Top
#1435527 - 03/28/08 02:17 PM Re: Gear Swap: Did I bite off too much, went with [Re: 98VicP71]
JWhittaker Offline
Climber

Registered: 09/21/01
Posts: 986
Loc: Seekonk, Ma
It is difficult if you don't have experience on rear ends....I've been thinking bout doing it myself but this is one area I don't have any "wrench time on". So the Vic will go to the shop when I find 3.55's and a job:) Already have the trac-loc in the basement thanks to Buck
_________________________
2002 CV LX Sport
Speed Bleeders installed with the new brakes!10/07-brakes 85K at the time
http://www.flickr.com/photos/[email protected]/2382004080/

Top
#1436114 - 03/29/08 03:11 AM Re: Gear Swap: Did I bite off too much, went with [Re: 98VicP71]
REAL4WD Offline
Over the Hill

Registered: 03/23/08
Posts: 4110
Loc: Glendale, CA
 Originally Posted By: 98VicP71
 Originally Posted By: AEQUITAS_VERITAS
 Originally Posted By: BigJon
your 3.55s will be fine. definitely get the trac-lok(posi), you will love it.


Thanks. Is the trac-lok hard to install?

 Originally Posted By: 98VicP71
you need a drive shaft loops most def. I would also do the forced lube mod and try and find you a MMC driveshaft.


and i believe a already hav a mmc driveshaft due to the fact i own a CVPI.


you will want to physically check your DS to make sure it is MMC as it was only an option the aluminum DS was standard on all CVPIs.

Track lock install requires the entire rear end to be torn down and rebuilt from what I understand so it would be something you may want a shop to install. Don't quote me on that but that is what I understand anyway.


and how do i know how to tell the difference between an aluminum and a mmc driveshaft?
_________________________

04 Crown Victoria LX Sport
95 AM General Hummer

Top
#1436119 - 03/29/08 03:36 AM Re: Gear Swap: Did I bite off too much, went with [Re: REAL4WD]
BigJon Offline

Grand Poobah

Registered: 06/30/02
Posts: 11796
Loc: Virginia
seeing that you have a 00 p71, you have the ammc ds. unless someone swapped it out, i doubt that.
_________________________
-Current:
2001 Crown Victoria P74

-Gone, but not forgotten:
1988 Mercury Grand Marquis
1994 Ford Crown Victoria
2000 Ford Crown Victoria HPP
2004 Ford Crown Victoria LX Sport
2004 Mercury Grand Marquis

Top
#1437804 - 03/31/08 07:31 AM Re: Gear Swap: Did I bite off too much, went with [Re: BigJon]
98VicP71 Offline
[email protected]
Grand Poobah

Registered: 03/28/06
Posts: 12731
Loc: ATL
you can't say he is garanteed to have the MMC driveshaft as it was an option just like the 3:55 gears. I have seen some 99's and 00s with the normal aluminum drive shaft and 3:27 gears.

There is a thread on the board already about the MMC shaft and how to determine if you have it.

I believe it is a green stripe or something on it. I can't remember off the top of my head though.
_________________________
1993 Lincoln Town Car 150k+ - RIP 5/10/2011
1998 Ford Crown Victoria P71 - RIP 12/25/2006
2001 Ford Crown Victoria P71(Count blackula) 297k+ - Ummmmmm evil

Top
#1437961 - 03/31/08 12:45 PM Re: Gear Swap: Did I bite off too much, went with [Re: 98VicP71]
BigJon Offline

Grand Poobah

Registered: 06/30/02
Posts: 11796
Loc: Virginia
all 00's received 3.55 gearing and the ammc ds on the p71. 3.27 were not offered as an option for that model year.

if anyone has a 2000 p71 with an aluminum ds or 3.27 gears, they were swapped in or the rear axle was replaced with a different model year.
_________________________
-Current:
2001 Crown Victoria P74

-Gone, but not forgotten:
1988 Mercury Grand Marquis
1994 Ford Crown Victoria
2000 Ford Crown Victoria HPP
2004 Ford Crown Victoria LX Sport
2004 Mercury Grand Marquis

Top
#1437964 - 03/31/08 12:48 PM Re: Gear Swap: Did I bite off too much, went with [Re: BigJon]
BigJon Offline

Grand Poobah

Registered: 06/30/02
Posts: 11796
Loc: Virginia
and yes, there will be a stamp on the ds that says ammc or mmc.

i think there was a green strip and possibly an orange one too. it has been a while since i have seen one. hopefully i will have one soon...
_________________________
-Current:
2001 Crown Victoria P74

-Gone, but not forgotten:
1988 Mercury Grand Marquis
1994 Ford Crown Victoria
2000 Ford Crown Victoria HPP
2004 Ford Crown Victoria LX Sport
2004 Mercury Grand Marquis

Top
#1438006 - 03/31/08 01:23 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: autotech57103]
Al Offline
Rookie

Registered: 12/27/07
Posts: 76
Loc: So Cal
I will tell you a little story about the gears. I have a 8.8 rear end set up with 3.73's on the side of the house, I was going to put those in the CV. Then I was talking to a buddy who called me a P^%$Y if I put those in. A real man, he says, would go 4.30, not wanting my manhood questioned I ordered the gears the next day. Summit or Ford dealer is the only place I could find them. Anyhow, I was really happy when I picked it up and hit the GO pedal and almost forgot I was in a 4K+ lbs. car. Then 3 days later the O/D light started to flash. My speedo is still off, I am guessing 100 on speedo is 80MPH. The installer put in a 23 tooth speedo gear, but said that is only good up to 3.73's. I talked to my Trans guy about a tune up on the trans, I am getting the driveline balanced and new U-joints this next weekend. Does anybody make a bolt on Driveshaft loop, seems a little extreme, I typically don't go over 90, but hey, you never know. I am planning on taking it to Irwindale 1/8 mile or Palmdale for the 1/4 soon. I will make sure I get pics and a video, I do like nice long burnouts at the track. As for Gas mileage, I took that into consideration, but don't forget it is GNG Powered. $2.75/gallon in CA right now, and I got the compressor for my house that makes it $.90/gallon. Looking to hook it up in the next two weeks. I am trying to figure out a way to temporarily hook up a Tach to see where i am at.

Al...
_________________________
If you don't know where your going, how do you know when you get there...

03 P71 CNG VIC
05 Mustang GT Convertible (Told the wife it was for her)
95 Bronco
96 Winnebago Adventurer
1373 Cubic Inches of FORD at my command

Top
#1438016 - 03/31/08 01:35 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: Al]
98VicP71 Offline
[email protected]
Grand Poobah

Registered: 03/28/06
Posts: 12731
Loc: ATL
WOW you did that to a CNG car

I would be curious as to how that holds up.

As to a bolt on Drive Shaft loop yes they make one. Chris from ADTR.net (site sposor) can get one for you and they are not that expensive.
_________________________
1993 Lincoln Town Car 150k+ - RIP 5/10/2011
1998 Ford Crown Victoria P71 - RIP 12/25/2006
2001 Ford Crown Victoria P71(Count blackula) 297k+ - Ummmmmm evil

Top
#1448448 - 04/12/08 07:51 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: 98VicP71]
Al Offline
Rookie

Registered: 12/27/07
Posts: 76
Loc: So Cal
Been having tuning problems lately, that will be another post, still on the fence about going back to 3.73's.
Al...
_________________________
If you don't know where your going, how do you know when you get there...

03 P71 CNG VIC
05 Mustang GT Convertible (Told the wife it was for her)
95 Bronco
96 Winnebago Adventurer
1373 Cubic Inches of FORD at my command

Top
#1448521 - 04/12/08 09:45 PM Re: Gear Swap: Did I bite off too much, went with [Re: Al]
luv-my-2002-p71 Offline
4v swap + Full Rauder Everything
Over the Hill

Registered: 06/24/04
Posts: 4128
Loc: New York
 Originally Posted By: Al
I will tell you a little story about the gears. I have a 8.8 rear end set up with 3.73's on the side of the house, I was going to put those in the CV. Then I was talking to a buddy who called me a P^%$Y if I put those in. A real man, he says, would go 4.30, not wanting my manhood questioned I ordered the gears the next day. Summit or Ford dealer is the only place I could find them. Anyhow, I was really happy when I picked it up and hit the GO pedal and almost forgot I was in a 4K+ lbs. car. Then 3 days later the O/D light started to flash. My speedo is still off, I am guessing 100 on speedo is 80MPH. The installer put in a 23 tooth speedo gear, but said that is only good up to 3.73's. I talked to my Trans guy about a tune up on the trans, I am getting the driveline balanced and new U-joints this next weekend. Does anybody make a bolt on Driveshaft loop, seems a little extreme, I typically don't go over 90, but hey, you never know. I am planning on taking it to Irwindale 1/8 mile or Palmdale for the 1/4 soon. I will make sure I get pics and a video, I do like nice long burnouts at the track. As for Gas mileage, I took that into consideration, but don't forget it is GNG Powered. $2.75/gallon in CA right now, and I got the compressor for my house that makes it $.90/gallon. Looking to hook it up in the next two weeks. I am trying to figure out a way to temporarily hook up a Tach to see where i am at.

Al...


Wow, impressive. Looks like you shut everyone here up!

nice! ;\)

0.90 a gallon is very impressive.

For a nice transmission: http://www.bc-automotive.com
For a super balanced driveshaft: http://www.dennysdriveshaft.com/

Keep up the great work! Let us know how you do in the 1/4.
Post it in the high perf forum.




_________________________
03 300A Ported uppper/lower | SW Longtubes | Borla ProXS | Magnaflow muffled X pipe | Circle D Pro series TC | J-Mod | MSD Cops | Kinsler | 255lph | Dyno tune | 3.73s | Trick flow cover | MMC shaft | 13.8 @ 99 N/A
08 MGM LS 17k! (13K in Aug-16) New daily driver | Loaded Black/Black leather, heated | remote start | factory security glass |Air Ride | Wood leather wheel | 2.73 RAR! | Borla Catback dual kit with H pipe

Top
#2630459 - 11/23/12 12:08 AM Re: Gear Swap: Did I bite off too much, went with [Re: Al]
Crown_me_Victor Offline
Rookie

Registered: 02/24/10
Posts: 66
Loc: Philadelphia, PA USA
I know I am bringing up this old post but out of pure curiosity, what happens if one were to use a custom made carbon fiber driveshaft with 4.30s? I've read that it allows a 1000 rpm increase in usable engine speed. Does that means that the engine would spin 1,000 rpms lower than normal for this gear ratio?
_________________________
1987 Lincoln Town Car (R.I.P.) my first car

1997 CVLX (R.I.P.) The first car that should have been!
176k+ mi: MZT, 4300K HID headlights, 6000k LED interior light (except cluster), PI driveshaft, extended tailhousing, forced lube mod, J-Mod.

2010 Ford Crown Vic Police Interceptor... I'm back to finish what I started

Top
#2630460 - 11/23/12 12:15 AM Re: Gear Swap: Did I bite off too much, went with [Re: Crown_me_Victor]
BillyBishop Offline
Expert mechanic
Poobah

Registered: 02/06/11
Posts: 5254
Loc: KY
Originally Posted By: Crown_me_Victor
I know I am bringing up this old post but out of pure curiosity, what happens if one were to use a custom made carbon fiber driveshaft with 4.30s? I've read that it allows a 1000 rpm increase in usable engine speed. Does that means that the engine would spin 1,000 rpms lower than normal for this gear ratio?

Do you have the money to buy a carbon fiber driveshaft?
_________________________
Originally Posted By: etcv97
forget this BS panther site your all just a bunch of [censored] holes..


1985 2 door vic-------2003 P71: Lots of mods-----1994 Buick Toastmaster
Past: 2002 P71, 1996 LTC, 2003 P71

Top
#2630464 - 11/23/12 12:43 AM Re: Gear Swap: Did I bite off too much, went with [Re: Crown_me_Victor]
Leadfoot Offline
Over the Hill

Registered: 01/11/11
Posts: 1015
Loc: Montreal, Qc, Canada
Originally Posted By: Crown_me_Victor
I know I am bringing up this old post but out of pure curiosity, what happens if one were to use a custom made carbon fiber driveshaft with 4.30s? I've read that it allows a 1000 rpm increase in usable engine speed. Does that means that the engine would spin 1,000 rpms lower than normal for this gear ratio?


No it won't spin 1,000 Rpms lower but because of the weight and construction of the carbon fibre ds it can spin 1,000 Rpms more before it vibrates and flexes as much as the others
_________________________
-Dave

2003 P74 Crown Victoria LX Spruce Green- TR3650 5speed swap, Marauder Cluster and gauge pod, Marauder spoiler, 04 cvpi, maf and zip tube, dual exhaust, 4.10 gears, metro rear control arms, SQ roll bar without partition, headlight relay upgrade, Pioneer Avic 930BT head unit + Axxess Metra ASWC-1 for steering wheel controls, 17" CVPI rims.
2004 Manual CVPI aka Guinevere - RIP

Top
#2630466 - 11/23/12 12:45 AM Re: Gear Swap: Did I bite off too much, went with [Re: Al]
Leadfoot Offline
Over the Hill

Registered: 01/11/11
Posts: 1015
Loc: Montreal, Qc, Canada
As for going with 4,30s , balls to the wall man!! Congrats I love it! Next you need to do a 5 speed swap, you'll love the acceleration that much more and the fifth gear helps a lot!!
_________________________
-Dave

2003 P74 Crown Victoria LX Spruce Green- TR3650 5speed swap, Marauder Cluster and gauge pod, Marauder spoiler, 04 cvpi, maf and zip tube, dual exhaust, 4.10 gears, metro rear control arms, SQ roll bar without partition, headlight relay upgrade, Pioneer Avic 930BT head unit + Axxess Metra ASWC-1 for steering wheel controls, 17" CVPI rims.
2004 Manual CVPI aka Guinevere - RIP

Top
#2630483 - 11/23/12 04:48 AM Re: Gear Swap: Did I bite off too much, went with [Re: Al]
Drac Offline

Cpt. Smug
Over the Hill

Registered: 03/19/10
Posts: 3345
Loc: Cali
Holy old thread.
_________________________

2004 Crown Victoria finished in Dark Pearl Blue Metallic (DX) | Ported M122 powered DOHC conversion with all supporting mods. Dyno queen.
2010 BMW M5 V10 finished in Monaco Blue Metallic with 2-tone interior | Eisemann race exhaust | Lowered On Dinan coilovers. Daily Driver

BlueVic's DOHC Supercharged Build.
Bluevic's 1,000 RWHP Returnless Fuel System.
2009+ Window/Lock/Mirror Control Switches Retrofit.
Mercury Cougar Trunk Switch Retrofit.








Top
#2630619 - 11/23/12 03:19 PM Re: Gear Swap: Did I bite off too much, went with [Re: Al]
ChrisM_NY Offline
Over the Hill

Registered: 03/01/12
Posts: 1677
Loc: Saratoga, New York
You know we enjoyed all 4 pages of it - 2.73 to 4.30 got sum balls
_________________________
2007 CVPI SAP 115K/800hrs

Top
#2631032 - 11/24/12 09:32 PM Re: Gear Swap: Did I bite off too much, went with [Re: BillyBishop]
Crown_me_Victor Offline
Rookie

Registered: 02/24/10
Posts: 66
Loc: Philadelphia, PA USA
I don't have the money for a carbon fiber driveshaft or many other things I'd like to get done at the current time. I just got done with my MZT a few months ago and now I'm about to put in dual exhaust. I've just heard and read so much about CF driveshafts and was wondering how it would help with higher numeric gears.
_________________________
1987 Lincoln Town Car (R.I.P.) my first car

1997 CVLX (R.I.P.) The first car that should have been!
176k+ mi: MZT, 4300K HID headlights, 6000k LED interior light (except cluster), PI driveshaft, extended tailhousing, forced lube mod, J-Mod.

2010 Ford Crown Vic Police Interceptor... I'm back to finish what I started

Top
#2631494 - 11/26/12 01:22 AM Re: Gear Swap: Did I bite off too much, went with [Re: Al]
Coach_Buzzcut Offline
Member

Registered: 03/17/12
Posts: 151
Loc: Lincoln, NE, USA
I read through this thread a while back and read through it again when I saw new posts. Honestly, 4.30s wouldn't be that bad around town. I jumped from 3.27s to 4.10s a while back and around town, there was barely any difference for me. It pulls a lot more revs on the highway though but I rarely leave town so that's of little concern. For the typical town commuter/stoplight dragger, the higher gears like 4.10s and such are very very tolerable. Even before the tune, my car drove fairly normal though it dragged out the gears a little much.
_________________________


2005 P71 (former Nebraska State Patrol)
-124k miles

Heinous upper/lower control arms, KYB shocks, Eaton lowering springs, Addco rear swaybar, 4.30s, port/polish plenum, full A/C delete w/delete pulley, shift tune, rebuilt exhaust w/all cats deleted, H-pipe deleted and dumped exhaust, 18'' chrome GT wheels with 255 tires, 20% tint, debadged.

Top
#2631643 - 11/26/12 02:23 PM Re: Gear Swap: Did I bite off too much, went with [Re: Coach_Buzzcut]
Fatsix Offline
Rookie

Registered: 04/01/12
Posts: 68
Loc: NJ
Driving in the rain and on cold tires is what sucks with higher gears. Spin spin spin. Turn a corner in the rain and bump the throttle, here comes the ass end around. Other than that they are fun.

I have 4:30's in T/A with nittos and double the HP. Would i put 4:30's in this car? Nah, I just want to get in the car and go, and not have to "DRIVE".



Edited by Fatsix (11/26/12 02:25 PM)
_________________________
2008 CVPI
C&L Upper, 75mm TB, OBX headers and exhaust, Summit under drive pullies, BH1976 Headlight harness, Cooper RS3-A tires.

95 F350 XL SRW
4:10's, BDP S1, D66, 17*, Locker, Stacks, Banks Cooler, Stancor GPR Under Construction

02 Silver Firehawk T/A #996 1LE
BRE cam, Darts, Ported LS6, Twin Disk, Spohn suspension, Moser 9" w/ 4:30's. custom x pipe, Powerbond UD. 436/409 old dual cutout setup.
90mm Fast and 42lb injectors waiting to go on.

1980 M-80 Malibu
Project 10.5" Tire car. Frame Off.

Top
#2631681 - 11/26/12 03:35 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: Al]
6lbsoft Offline
Member

Registered: 12/01/10
Posts: 208
Loc: So. California
My 97 F150 running a 33" tire had 4.30's and it felt almost too low for freeway use...
_________________________
2003 P71 Ex Pomona PD K9 with 205,000 miles. KYB's, Flowmaster 40 series with turndowns and a K&N. 5% tint all windows, bumper tuck and Uniroyal Tiger Paw shoes. 24" LED light bar tucked under push bar and Hiraki LED headlights.

Top
#2631799 - 11/26/12 08:34 PM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: 6lbsoft]
Fatsix Offline
Rookie

Registered: 04/01/12
Posts: 68
Loc: NJ
Originally Posted By: 6lbsoft
My 97 F150 running a 33" tire had 4.30's and it felt almost too low for freeway use...

7" difference in tire diameter changes things...a lot.
_________________________
2008 CVPI
C&L Upper, 75mm TB, OBX headers and exhaust, Summit under drive pullies, BH1976 Headlight harness, Cooper RS3-A tires.

95 F350 XL SRW
4:10's, BDP S1, D66, 17*, Locker, Stacks, Banks Cooler, Stancor GPR Under Construction

02 Silver Firehawk T/A #996 1LE
BRE cam, Darts, Ported LS6, Twin Disk, Spohn suspension, Moser 9" w/ 4:30's. custom x pipe, Powerbond UD. 436/409 old dual cutout setup.
90mm Fast and 42lb injectors waiting to go on.

1980 M-80 Malibu
Project 10.5" Tire car. Frame Off.

Top
#2631896 - 11/27/12 12:30 AM Re: Gear Swap: Did I bite off too much, went with 4.30 [Re: Al]
CameronVic Offline
Coolest guy on CVN
Poobah

Registered: 03/25/09
Posts: 5345
Loc: In the beams!
Yea, like a 22" rollout difference!
_________________________
1999 P71, Chevy 6.0, billet 85mm turbo, 4L80e, 3.73s, E85, etc. [email protected]
2006 P71, bone stock sans JMOD
2003 Marauder, LS swap in the works.

Top
Page 1 of 5 1 2 3 4 5 >

Who's Online
1 registered (1 invisible), 39 Guests and 130 Spiders online.
Key: Admin, Global Mod, Mod
Email Login
EMail Login Name
Password
 New users, sign up!
Top Posters (30 Days)
bluejay_32 204
a_d_a_m 126
Old_Guy_Stu 124
DudeAbides 95
Ponyguy 68
Davidzq 47
CrystalPistol 46
Moby_Vic 44
ClayBelt 38
Bangster 35
Member Spotlight
Member Since: 01/30/05
Posts: 69





Copyright 2000-2015 by Crownvic.net and Steve Spaulding. All Rights Reserved.
The photographs, graphics and data contained in this Web site are the properties of the contributors, or Crownvic.net and may not be used without expressed written consent.
Crownvic.net is not affiliated with the Ford motor company.

Happily consuming the fuel saved by Prius owners!