Jmod complete, but slight problem

If I recall correctly there were to sets of grooves for that snap ring, and it needs to go in the groove thats farther into the bore.
 
if youre still question what to go with just find a fewq cars with the j-mod and whatever shift kit you want. drive them and see how they act.

i took a friend for a ride who went thru 5 different shift kits on his mustang before he found 1 acceptable. under light throttle he didnt believe me when i told him i did anything to the trans. it shifted at the proper points without hanging up or slamming into gear. when we got on the highway i nailed it, broke loose and got sideways in 2nd, scratched third. he was impressed that it could be so docile on side streets and still hit like that under WOT.
 
The total project take avarying amount of time depending on your epuipment and how anal you are.

I would set aside 2-4 hours depending on those things. It took me 2 hours to change my valvebody and I was going slow and careful.
 
I was just nervous about doing the actual jmod, it was for my DD and I absolutley could not have the tranny get messed up in any way. A few extra $ for a lot of confidence and security was VERY worth it to me.
 
Ask the people from where you are going to get it, Im sure they are all different.

Did the snap ring end up fixing it?
 
Yea, but keep in mind the accumulators are not in the valve body, so you need to swap them.
 
hey guys while we are on this subject of our 4r70w trans,,,my 93 markVIII chirps(gets rubber)the tires when I shift from first to second myself when getting down,does it mean I have a jmod already or need one someone said my accum.needs to be replaced??trans seems to work fine
 
newguy said:
hey guys while we are on this subject of our 4r70w trans,,,my 93 markVIII chirps(gets rubber)the tires when I shift from first to second myself when getting down,does it mean I have a jmod already or need one someone said my accum.needs to be replaced??trans seems to work fine
Click to expand...

sounds like your 1-2 shift accumulator spring is broken
 
chickenviii said:
sounds like your 1-2 shift accumulator spring is broken
Click to expand...

Which means your trans will likely fail w/out any warning if you keep leaving rubber on your 1-2 shift.

Then you'll be cruising around in first gear unable to shift trying to limp the car home until the trans gets hot and you lose first.
 
poniesviii said:
Which means your trans will likely fail w/out any warning if you keep leaving rubber on your 1-2 shift.

Then you'll be cruising around in first gear unable to shift trying to limp the car home until the trans gets hot and you lose first.
Click to expand...

Learned from experience?
 
Figured I'd post up the conclusion to the original topic. I re-inserted the snap ring and now everything works fine. Shifts are crisper but not harsh. The car wont chirp the tires on the 1-2, but I no longer find myself twiddling my thumbs while I wait for the car to shift.
 
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