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Discussion Starter #1
I'm thinking of having the J-Mod done on my '97 T-bird, so I've been reading the tech articles and old message board posts related to the subject. I have pretty much no experience working on cars but I think I have the gist of what's going on with the J-mod. I just want to make sure I understand:

-- The J-Mod is and the Transgo and B&M kits do similar things, but the J-Mod is better and comes highly recommended.
-- I won't need to have the chip reburned in order for the J-Mod to be effective.

Because I don't feel confident doing this myself (although some guys say its pretty easy) I think I'm going to find a shop to do it. If I do decide to try it myself with the help of someone with a clue, about how long does it take?
 

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Trumpeter Extraordinaire
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2,917 Posts
The 'J-mod' was designed by the Senior Design Engineer of the 4R70W transmission; the other shift kits aren't. To me, that is a huge difference in favor of the 'J-mod.' I read, studied, and re-read the articles and posts for a year before I had it done. My brother, who works on cars as a side job and hobby, assisted me with the basic 'J-mod.' Including a well-deserved dinner break, the modification took just under 4 hours.

I have an Apten chip, and reburning is not required if a transmission shift kit/J-mod is performed.
 

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Sweet T
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3,452 Posts
It's been said a few times... but.. it bears repeating.

If you can change your oil, you can handle the basic steps of the j-mod. Just be careful and take your time. Be extra careful with the drilling of the seperator plate because that's an expensive unit. The 1-2 accum and the 2-3 accum are painfully simply jobs if you have some help, though the snap rings can be something of a bear to remove.

If you've got a mechanic you can trust to do it and not ream you or screw something up, then take it to them if you want. It's a very simple task, (just time consuming) especially with A-Train's instructions.
 

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Discussion Starter #4
I do change my own oil, so maybe I will try it myself. What's the worst that could happen? ;)

Although the chip isn't necessary, would it help improve the shifting?

Thanks, guys.
 

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yes the chip will further improve your shift points since the 4r70w is electronically controlled. Get the chip and you will be pleasently suprised. It really wakes up or big girls.
 
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