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post #1 of 6 (permalink) Old 03-22-2004, 06:35 PM Thread Starter
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J Mod For F150 Or Not

I have a 95 f150 4x4 with a 4r70w trans I was wondering would the JMOD be
suitable mod for my truck or should I use another shift kit ( transgo, bauman or other). I would like to firm up my shifts especially 2-3 and 3-4. If the JMOD is recommended MOD should I just use the table for the mild to 300hp , the only other
mods to my truck are a cat back exhaust and k&n airfilter.
I also was wondering if doing the JMOD can help with a shuddering problem, or am I going to need to change my torque converter( I already switched to mercon v) but it continues to shudder. If the torque converter needs to be changed does
anyone have a recommendation and part#.

The transmission only has 5,000 miles since complete rebuild including TC change
(by a now out of bussiness shop).

I would also like the name of a reputable transmission shop in or around Marietta,
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post #2 of 6 (permalink) Old 03-22-2004, 11:23 PM
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before i went that far with a f150 like yours, i would look into regromming the psom and making sure its got the right code for your tires your running and your gear ratio. i did it to mine and boy what a huge difference, now my truck is a 351, e4od , 4.56 gear, 35 inch rubber, and it made a huge differance in the way the trans shifted and straight out performance, and gets actually somewhat reasonable fuel economy. the speedo, computer and transmission are all tied together on the 92+ f series trucks, its supposed to make it react better to driving/loads condtions, thats what i was taught in ford tech school.

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post #3 of 6 (permalink) Old 03-23-2004, 07:03 PM Thread Starter
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Thanks for the reply JK89CAT , I checked the PSOM it was set at
a (9.14) conversion factor ,I am running Bridgestone 31x10.50R15LT's
I checked Bridgestone's web site and the rpm's were 681 refigured the
conversion factor and set it to (9.19). This seems to have help the
shuddering some. It is still there though along with the soft 2-3 and
3-4 shifts. Would the JMOD or Transgo be the best way firm up the shifts
on a truck.
If anyone knows a good Trans shop around Marietta, Ga. please let
me know.
Thanks again for the reply.
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post #4 of 6 (permalink) Old 03-23-2004, 07:59 PM
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sure it is a great way to firm up the shifts.

On a 95, I would just change the 1-2 and 2-3 accumulators and springs, and drill the plate.

I don't bother with the reverse or od springs.

Its a good learning experience for someone, install a cooler, a new pan filter, and an inline filter at the same time.

Also, get a chip for the truck, that will firm up the shifts a bit more, and you will think you are driving a new truck.

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post #5 of 6 (permalink) Old 03-23-2004, 08:04 PM
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Best bet for good info for you would be to go over to forums.modulardepot.com and see if anyone there has specifics for things that may be different on an F150 than a Tbird/Mustang/Crown Vic. The creator of the J-mod posts there.

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post #6 of 6 (permalink) Old 03-25-2004, 06:03 AM Thread Starter
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Sorry for the delay in responded , but thanks for the info . I'm going post on the
modulardepot site and see if any thing is different.
Again I say thanks for the help
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