After dodging a bullet with a leaking line last night, I still want a better transmission I have 2004 Gt Automatic with 2800 Tq converter I'm running 4:10 gears Sct Tune by Ed Clark at Steen Racing, I know all the 5 speed guys will say swap, Pushing the clutch will not work for me to much back and left leg nerve damage, I like the auto but hate the sluggish shift with the tune it shift great as long im in the the pedal but if I'm just driving its like doing 15 in third gear on a 5 speed just real boggy, is there anything that can be done.

 

Done the J-mod or PA valvebody yet?

 

Ed can adjust the shift points for full and part throttle. Id also do the JMod like Icefreezen suggested. However, theres no reason for spending $200+ on a new valve body. You can do the JMod for about $5 plus the price of fluid. Here is my write up on it, http://www.dndgarage.net/jmod.htm If you want a new tranny, then I HIGHLY recommend talking to Darrin at www.bc-automotive.com

With the J Mod, I chirp the tires on the 1-2 shift at half throttle with my street tires.

BTW, that stall is a bit low. You might want to discuss that with Darrin too.

Now if you want to be able to shift the car then youll need a manual valve body. However, I dont recommend that because letting the computer shift is a lot more consistent.

 

Thanks For the advice you guys Rock

 

Will a Jmod work on a 1996 4R70W? That is what shows on my pan as my car having.

 

Yep, its just slightly different http://tccoa.com/articles/tranny/index.html#

http://tccoa.com/articles/tranny/index.html#

 

why do you leave the spring out for the 1-2 accumulator piston?

 

Makes the car shift hard. If you leave the 1-2 or 2-3 in then it wont shift as hard.

 

I put different springs in but it shifts just as hard as it did with j-mod at WOT. But normal driving its not as harsh.

 

you totaly remove the spring the for the 1-2 accumulator piston? god thats weird.

 

Thats what I said but believe it or not these trannys dont need them. Shifts hard my only problem with it is that it shifted hard all the time normal driving and getting on it. I talked to a few people and just to be on the safe side this time I had different springs put in. Kind of like the ones in shift kits. Now it's a lot better