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#1357386 - 12/30/07 06:31 PM Recommended posi-traction Unit
crown_vic_driver Offline
Member

Registered: 05/22/06
Posts: 113
Loc: Birmingham, AL
What do any of ya'll recommend to get for a posi-traction unit? What all different units do you all have in your cars that didn't come with it in the factory rear end.
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#1357400 - 12/30/07 07:23 PM Re: Recommended posi-traction Unit [Re: crown_vic_driver]
metroplex Offline
Metroplectic

Registered: 11/13/00
Posts: 49817
Loc: Motor City, USA
Ford Traction-Lok differential.

Auburn, Eaton, Traction-Tech/Detroit Locker/Detroit TrueTrac and other limited slip differentials are popular, but the Ford Traction-Lok differential is hard to beat. The Ford units are used on the 03-04 Terminator Cobras, the 05-up Mustang GT, and the Shelby GT500. If it is good enough for 500+ hp, it's good enough for a Crown Vic.
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#1357445 - 12/30/07 08:34 PM Re: Recommended posi-traction Unit [Re: metroplex]
Quickvic30 Offline
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Grand Poobah

Registered: 02/24/05
Posts: 10911
Loc: Minneapolis, MN
 Originally Posted By: metroplex
Ford Traction-Lok differential.

Auburn, Eaton, Traction-Tech/Detroit Locker/Detroit TrueTrac and other limited slip differentials are popular, but the Ford Traction-Lok differential is hard to beat. The Ford units are used on the 03-04 Terminator Cobras, the 05-up Mustang GT, and the Shelby GT500. If it is good enough for 500+ hp, it's good enough for a Crown Vic.


Agreed, fords unit does the job well \:\)
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#1357452 - 12/30/07 08:42 PM Re: Recommended posi-traction Unit [Re: Quickvic30]
JohnG Offline
Tech Admin
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Registered: 06/15/01
Posts: 13025
Loc: Socialist state of MN
Because the Trac-Lok is completely rebuildable w/o removing the carrier, and one of the best units for everything BUT rock-crawling (which no Panther can do anyway) I too believe that they are the best option.

The Trac-Lok does require carrier and ring-gear removal for installation, but in many cases the new carrier bolt in w/o any changes in shimming. Therefore, installation is very straightforward.
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#1357546 - 12/30/07 10:53 PM Re: Recommended posi-traction Unit [Re: JohnG]
dRock96Marquis Offline

Da Governator
Posting Addict

Registered: 02/21/05
Posts: 24351
Loc: Maryland
I completely agree with the above. The Ford (FRPP is same) traction lok is really your best choice. OEM reliability and driveability, very easy and cheap to rebuild, and is a BREEZE to install (especially since, usually the tolerances will be right on with factory shims)


 Quote:
...everything BUT rock-crawling (which no Panther can do anyway)

I dunno, SUVic's aero might of been able to climb some small boulders
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#1357835 - 12/31/07 08:59 AM Re: Recommended posi-traction Unit [Re: dRock96Marquis]
robs Offline
Over the Hill

Registered: 02/17/02
Posts: 1425
Loc: O'Fallon, IL
If I had an extra $600... Got one in my Jeep... They're harsh, make scary noises at times, and have bad road manners... I absolutely LOVE it.




Unfortunately, I've got a Trac-Loc from a Mustang to install instead. Just can't justify the extra cash for the Detroit Locker.

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#1357862 - 12/31/07 09:40 AM Re: Recommended posi-traction Unit [Re: robs]
metroplex Offline
Metroplectic

Registered: 11/13/00
Posts: 49817
Loc: Motor City, USA
I would not recommend a Detroit Locker for a Crown Vic unless it is for drag racing only, or for dry summer roads.

A Ford Traction-Lok differential is about $230 new retail, while takeoff units cost anywhere from free to $100.

The rebuild kit that includes carbon-fiber clutches (OEM on 03-04 Cobra, 05-up Mustang GT, and 07-up GT500) is only $90 while the rebuild kit with standard clutches (OEM since ~1986 in T-Lok units) is $30+.

Generally speaking, you can just swap the ring gear over to the new carrier and not worry about backlash or shimming. It's necessary to check the backlash and bearing pre-load, but again, generally speaking, it is an easy swap as John mentioned.

FRPP has a ring-gear/flywheel bolt kit for $10 that will cut your install time SIGNIFICANTLY since you don't have to wait for the threadlocker to cure.
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#1357963 - 12/31/07 12:25 PM Re: Recommended posi-traction Unit [Re: metroplex]
Dan The Vic Man Offline
Poobah

Registered: 11/22/03
Posts: 9882
Loc: Coon Rapids MN
I have an arburn diff and i absolutely love it, cone clutches instead of the flat ones in the stock trac loc units from ford, i am extremely hard on my vic and the ford trac lock takes a hell of a beating, but i decided to upgrade diffs when i did my gear upgrade.
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#1358066 - 12/31/07 02:48 PM Re: Recommended posi-traction Unit [Re: Dan The Vic Man]
Quickvic30 Offline
Just watchin
Grand Poobah

Registered: 02/24/05
Posts: 10911
Loc: Minneapolis, MN
the ford 8.8 will be plenty for you CVD \:\)
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#1359560 - 01/02/08 02:35 PM Re: Recommended posi-traction Unit [Re: Quickvic30]
crown_vic_driver Offline
Member

Registered: 05/22/06
Posts: 113
Loc: Birmingham, AL
After reading all of your comments I'm probably gonna go with teh ford racing traction lock.

I wish I would have got one and just got it all put in when I got my gears done. The guy who did my gears said he might have to take the pinion back out if they are not lined up correctly after he puts my ring on the traction lock carrier.
_________________________
1999 Ford Crown Victoria P73
3.27 gears, aluminum driveshaft, Dual Delta 40-series Flowmaster Exhaust without H-Pipe, Tint, new upgraded PI intake manifold

http://www.cardomain.com/ride/801867

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#1359986 - 01/03/08 12:21 AM Re: Recommended posi-traction Unit [Re: crown_vic_driver]
dRock96Marquis Offline

Da Governator
Posting Addict

Registered: 02/21/05
Posts: 24351
Loc: Maryland
 Originally Posted By: crown_vic_driver
After reading all of your comments I'm probably gonna go with teh ford racing traction lock.

I wish I would have got one and just got it all put in when I got my gears done. The guy who did my gears said he might have to take the pinion back out if they are not lined up correctly after he puts my ring on the traction lock carrier.



He shouldn't have to, especially if you go with the FRPP unit. Normally it will slide right in with the same shims and be spot on ;\)
You still need to check the backlash, though - and if it's off he may need to reshim the carrier. But he shouldn't have to mess with the pinion at all.
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-'03 MB SL55 AMG (toy) -'08 MB GLK350 (d/d) -'95 Mark VIII (under renovations) -'02 Navigator ("beater")
-Panther info & FAQs-


RIP 2vmodular

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#1360018 - 01/03/08 01:20 AM Re: Recommended posi-traction Unit [Re: dRock96Marquis]
BigJon Offline

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Grand Poobah

Registered: 06/30/02
Posts: 11629
Loc: Upstate NY
 Originally Posted By: dRock96Marquis

I dunno, SUVic's aero might of been able to climb some small boulders


unfortunately his car is no more. \:\(
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