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What is best tranny for 2000 grand prix

C

Compjd84

New member
I have a few grand prix so that race 1/2 mile circle track using 2nd gear only is there a tranny that has a better final drive. Looking for just a little more. Any help appreciated
 


The "regular" 4T65e has a 3.29 gear ratio in the SE and GT trims, the 4T65e HD in the supercharged cars have a 2.93 gear ratio.

Niether are really stronger than the other, both have the same exact weak points. The 3.29 gear transmission seems to get the advantage in first gear/take off but I don't know off hand how they would compare for actual 2nd gear gearing. I doubt it's much different or enough to worry about. The biggest change is 4th gear where the GT tranny runs several hundred rpm higher at 70 mph than the GTP transmission.

If you did swap them around you would have to tune the computer for the swap.
 
We're running 85-90 in 2nd with a modded computer moving shift points just trying to find just a bit more. Torque off corner
 
I would love too but rules don't allow that but we have nothing for tranny rules so was just looking for a better 2nd gear option
 
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