Ok, so I have been enjoying my 2005 Grand Prix GXP for several months now, but I am wanting to make a few changes. I have decided to start with drive ratio. I have been doing some searching, and believe I have the correct idea going, but wanted to verify my research.
Especially since most of what I read referenced the 2006+ transaxle.
If I understand this correctly my LS4 is hooked up to a 4t65e-hd transaxle. From what I have read thus far my final drive ratio is 293/1. This is achieved with a 37 drive/33 driven gear and chain set, as well as a 3.29/1 final drive. I am not sure if this transmission has the dual 3/8" drive chain set or not.
It is also my understanding that both a 33 drive 37 driven gear and chain set, as well as a 35 drive and 35 driven sets are available, and can be had in stronger single 7/8" set. These would result in a 2.29/1 or a 3.69/1 final drive. respectively.
If that info is correct, I should be able to find a local shop that can get the parts and do the swap for me....
Any input is appreciated! Thank you in advance!!!
