Originally Posted by DScruggs
Why is it that every time I read any detailed information about the J-Mod here in the tech articles it is CLEAR that it can only be done during a full rebuild. It includes hard parts deep inside the transmission.
Yet I continually see folks talking about doing a J-Mod at a meet in a few hours. That is why I am confused.
I HAVE searched. I HAVE read about 2-3 hours worth of data on the J-Mod and am MORE confused now then I was when I started.
How can it be a "shift kit" when it involves replacing internal parts. Maybe there are multiple "levels" of J-Mod? I did see that the "FordPartsCounter" guy listed parts for a 'mild' J-Mod.
I am getting more confused the more I read.
Can anyone clear this up for me?
1st link is the full tranny rebuild to j-spec.
2nd and 3rd were pulled from 1st to do just the shift-kit portion of it.
2nd is upgrading the accumulators and pistons and which springs to replace/remove.
3rd is modifying the valve body.
In the 2nd most at least change the 1-2 accumulator to the updated style and leave the bottom spring out and update the 2-3 accumulator and leave the spring out on it.
In the 3rd you drill the separater plate out to the level of HP you are producing.
Just make sure you find the correct pic for the valve body year you are using as some of the holes moved in 98, I believe.
An external tranny cooler is also recommended to futher extend the life of the tranny.
2nd and 3rd is done with the tranny in the car, unless you happen to have it out for another reason.
Hope I got that right and helped clear it up a little. It confused the heck out of me when I first heard about it. I did all my research and got it done in about 6 hrs. taking my time and double checking everything before I drilled and put it back together.
02 AL PI 4.6L, 02 GT MAF and air box, SCT tune by lonnie.
2.25" true duals, no cats, Borla XS mufflers.
96 trans with 300HP + gear change J-mod, Mark VIII TC, & Hayden 30K GVW cooler.
Solid Rubber engine and tranny mounts. Polly front-end, tranny crossmember, and IRS bushings.
3.73 TL, 93 Mark VIII DS. Tokico Blues all around.
PBR dual piston calipers in front, Rear Disc Brake Swap.
97 console. Cooper 225/60/16s.
14.874 @ 93.56
with 3.27 before 3.73 upgrade