GM Trans to 7M write up

madsupra88

BoOoOoST
Sep 17, 2005
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3.73 gears, had me at 70mph at 3100 rpm. 400 and 350 have different final drive ratios though so im assuming depending on your wheel setup, you could get it to cruise at 2800 at 70 with the th400.
 

madsupra88

BoOoOoST
Sep 17, 2005
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Ahh i got it mixed up,

th350= 2.52/1.52/1.0
th400=2.48/1.48/1.0

11.24 was my best with the gm setup , didn't push it to full boost was only at 18psi on a garret 67 . 26" tall tires.
 

madsupra88

BoOoOoST
Sep 17, 2005
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Never had 2step/anti lag. had a 50 shot (wet) 1st/ half way through 2nd. getting up on the converter was not bad at all. actually launched like a bat outta hell!

I have my kit made up for my 2J , Not sure if im gonna use it, thinking about keeping the r154 in her to enjoy cruising more.

One thing i didnt like about the gm setup is cruising around . just not as fun as 5sp.

But im currently looking to make a 4L80e kit . I have my th350/2j setup for sale now.