View Full Version : Auto Tranny Mods

01-04-2017, 03:28 PM
I am a new owner of a stock low mileage 1994 SC. I like the power and I really like the handling, but the tranny shifts pretty poorly. Are there any mods for this transmission without spending a fortune?

01-04-2017, 04:12 PM
Yes, since it is a 94, it has the 4R70, so you can do the J-mod.

01-04-2017, 04:29 PM
J-mod can be had for about $130 by a pro

Jimmy 2Coupes
01-05-2017, 05:31 PM
Best mod would be to upgrade the transmission to a J-modded 98-02 version. The earlier 4R70W's have several weak areas that were addressed in the later versions. Much better internals.

01-05-2017, 07:32 PM
what Jimmy said.... Alan "Dirty Dog" Brown can let ya know what you need....

01-06-2017, 03:29 PM
Thanks for the J-mod info. In my area is one reputable transmission shop but they firmly believe "stock is best." Are the J-mod components available as a kit? Might help me convince them to do the install.

01-06-2017, 08:54 PM
Yes, they are called transmission kits I believe, and are supposedly doable at home. I wouldn't try it personally

01-07-2017, 09:34 AM
Here's a step by step how to.............