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#1801213 - 06/29/09 01:52 PM J-Mod this week!!! Spring or not to spring?
BH1976 Offline
Over the Hill

Registered: 03/27/07
Posts: 2491
Loc: Oakland Co., MI
AKA_Rizzo and I are doing the J-mod to my whip this Thursday and I'm having a tough time deciding on whether or not to remove the (I believe) the 1-2 spring or replace it with the "Mustang" spring.

I am the sole driver of the car and want firm shifts, hands down.
If I'm going to spend the time to do this I only want to do it once.

Is there anyone else on here that has done this and can share your experiences? I'm only looking for people who have done this and their opinions ONLY. Thank you. \:\)
_________________________
"OEM Mods" cool

'16 Shadow Black F-150 XLT 4x4, 5.0L, some mods
'15 Magnetic Metallic Mustang GT, PP 1, 6-spd, Thermal R&D exhaust


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#1801218 - 06/29/09 02:00 PM Re: J-Mod this week!!! Spring or not to spring? [Re: BH1976]
98VicP71 Offline
[email protected]
Grand Poobah

Registered: 03/28/06
Posts: 12731
Loc: ATL
I would vote to remove both the 1-2 springs and 2-3 springs..

That is what I did with mine. I am very happy with the results.

Also depends on what you are looking for.

Myself I like the crisp feeling of gear changes like in a manual trans..

With a JMOD and full performance trans settings in the tune I could not be happier.

To give you an idea...

http://www.youtube.com/watch?v=BE7gf4NETro
_________________________
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

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#1801219 - 06/29/09 02:01 PM Re: J-Mod this week!!! Spring or not to spring? [Re: BH1976]
Rizzo Offline
J-MOD Master
Metroplectic

Registered: 03/06/04
Posts: 29215
Loc: Romulus,MI
I know we have already talked, This is just for anyone else who may search this later.


I have developed a system that works great for me. Everyone knows when their car is going to shift. If I don't want to feel any effects of having gone "Springless" I will let up on the throttle a split second before the shift from 1-2 starts, This seems to lower trans pump pressure by lowering the engine's RPM's just enough that as the car shifts you can't even feel it.

You are allowing firmer and quicker shifts by doing the Jmod and bending the guidelines a little by removing the springs, But you can control how much and how often you feel it via throttle control.

I thought about using cranberry juice in a clear bottle to show the results of the shifts on the juice in a video. But I can't find a good place to put the camera while I am driving.
_________________________


The Jmod video is done! LINK!

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#1801243 - 06/29/09 02:29 PM Re: J-Mod this week!!! Spring or not to spring? [Re: Rizzo]
BH1976 Offline
Over the Hill

Registered: 03/27/07
Posts: 2491
Loc: Oakland Co., MI
 Originally Posted By: 98VicP71


Thanks. That's what I'm after.


 Originally Posted By: AKA_Rizzo
I know we have already talked....

Are you sure? Because I don't remember. J/K bro!
_________________________
"OEM Mods" cool

'16 Shadow Black F-150 XLT 4x4, 5.0L, some mods
'15 Magnetic Metallic Mustang GT, PP 1, 6-spd, Thermal R&D exhaust


ff usa

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#1801992 - 06/30/09 02:50 PM Re: J-Mod this week!!! Spring or not to spring? [Re: 98VicP71]
Crown Nick Offline
Over the Hill

Registered: 01/12/07
Posts: 3244
Loc: Houston, TX
 Originally Posted By: 98VicP71
I would vote to remove both the 1-2 springs and 2-3 springs..

That is what I did with mine. I am very happy with the results.

Also depends on what you are looking for.

Myself I like the crisp feeling of gear changes like in a manual trans..

With a JMOD and full performance trans settings in the tune I could not be happier.



x2, feel the exact same way. Too harsh of a shift is relative to each person, but I love mine without either bottom spring and the performance shifting tune from BOC. I've heard people say they felt their's was shifting too harshly after removing the 1-2 spring, but I can't see where they're coming from to be honest. If you like a good firm snappy shift, remove the bottom 1-2 spring.
_________________________


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#1802471 - 07/01/09 03:09 AM Re: J-Mod this week!!! Spring or not to spring? [Re: Crown Nick]
cleb Offline
Stranger

Registered: 06/20/09
Posts: 9
Loc: Pacific NW
I just did the jmod on my 2006 P71. I replaced both the upper and lower springs with a custom set from BC automotive. 1-2 is fast, but not too firm. Even at WOT, its more mellow than I thought it would be. 2-3 is fast, and firm. At WOT it lets you know its there, but nothing violent. All in all I'm happy with it. I didn't want the rear tires breaking loose on a WOT 1-2 if I had to get on it in the rain, etc. It also seems like at some point that much of a jerk has to be hurting other drivetrain components. From what I've read the harshness can vary a bit depending on the year. My 2000 P71 without the JMOD would snap 1-2 hard when it was warm, the 06 with the JMOD isn't near as harsh. Don't know until you try it... Nice thing is you don't have to drop the valve body if you want to take the 1-2 springs out, or put lighter ones back in. Definitely remove the lower 2-3 spring.

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#1802541 - 07/01/09 08:10 AM Re: J-Mod this week!!! Spring or not to spring? [Re: cleb]
GaryinVT Offline
Over the Hill

Registered: 09/24/06
Posts: 3176
Loc:
It would be great if there were a chart simply listing the J-Mod options and their effects. J-Mod has become a huge topic when searching.

Should I use conventional or synthetic oil and then do a Sea Foam treatment after doing a J-Mod, or should I save my money for a new pushbar?
_________________________

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#1802543 - 07/01/09 08:11 AM Re: J-Mod this week!!! Spring or not to spring? [Re: GaryinVT]
98VicP71 Offline
[email protected]
Grand Poobah

Registered: 03/28/06
Posts: 12731
Loc: ATL
I would just get good quality Mercon-V and you will be fine.

Get something like Motorcraft, Royal Purple, Amsoil..
_________________________
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

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#1802641 - 07/01/09 10:54 AM Re: J-Mod this week!!! Spring or not to spring? [Re: 98VicP71]
Markilla Offline
Member

Registered: 03/19/08
Posts: 275
Loc: Petrolia, Ontario
Remove both lower springs, it's not harsh at all.
_________________________
2003 Cvpi - traclock,75mm Tb,shark plenum,A/C Delete,rear addco,floor shift with console,Jmod, rear cat delete,cherry bombs, marauder wheels/cluster/spoiler, mach 1 chin spoiler, Underdrives, svt focus pump, 24lb injectors, 1 step colder plugs, MZT with 89 octane tune, 3.73's, PI 3200 stall, TCI trans cooler


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#1802646 - 07/01/09 10:58 AM Re: J-Mod this week!!! Spring or not to spring? [Re: Rizzo]
interceptor1985 Offline
Poobah

Registered: 02/07/08
Posts: 5825
Loc: OREGON
 Originally Posted By: AKA_Rizzo
I know we have already talked, This is just for anyone else who may search this later.


I have developed a system that works great for me. Everyone knows when their car is going to shift. If I don't want to feel any effects of having gone "Springless" I will let up on the throttle a split second before the shift from 1-2 starts, This seems to lower trans pump pressure by lowering the engine's RPM's just enough that as the car shifts you can't even feel it.

You are allowing firmer and quicker shifts by doing the Jmod and bending the guidelines a little by removing the springs, But you can control how much and how often you feel it via throttle control.

I thought about using cranberry juice in a clear bottle to show the results of the shifts on the juice in a video. But I can't find a good place to put the camera while I am driving.


Cranberry and Vodka is a good drink....

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#1803795 - 07/02/09 10:30 PM Re: J-Mod this week!!! Spring or not to spring? [Re: Markilla]
new2me2003CVPI Offline
Over the Hill

Registered: 10/17/04
Posts: 1499
Loc: Germantown, Wi.
 Originally Posted By: Markilla
Remove both lower springs, it's not harsh at all.

That's what I did. I can drive the car so you would never know
or I can step on it and chirp those gears. There's
nothin better than steppin on it at the light to get past an ass
and havin them hear me chirpin tires as I blast ahead.
REMOVE THE SPRINGS!!!!!!
_________________________

2011 Candy White VW Jetta. Saweeet!
2003 CVPI with a few mods. Bumper tuck. 2001 Exploder cd player. J-Mod. Headlight relay upgrade Custom made by me. Viper 1700xl remote start. General Altimax Hp 245/50/16 tires. Gatorback belt. Underdrive pulleys(So What!!!) And now 20% tint all around!!!

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#1806059 - 07/06/09 12:57 PM Re: J-Mod this week!!! Spring or not to spring? [Re: new2me2003CVPI]
BH1976 Offline
Over the Hill

Registered: 03/27/07
Posts: 2491
Loc: Oakland Co., MI
Springs removed and J-Mod done. Very happy with results.

I will start another thread tomorrow when I post pics.
_________________________
"OEM Mods" cool

'16 Shadow Black F-150 XLT 4x4, 5.0L, some mods
'15 Magnetic Metallic Mustang GT, PP 1, 6-spd, Thermal R&D exhaust


ff usa

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