2005gxp

What are the pro's and cons to going to a 3.29 gear in my gxp?

06 SS

pro would be that your speedometer would be accurate as you already have 3.29 as the final drive ratio. If you mean changing the chain/sprocket reduction from the effective 2.93 ratio to get to a true 3.29 final drive, then I would suggest no. Your turbo will severely traction-limit you with the stock set-up, much worse if you shorten up the gearing. Also, the turbo will like the extra load the engine sees with the stock gearing and spool faster. Only reason to swap in my opinion is if you are looking to change the powerband for a specific application, like trying to cross the traps @ a higher RPM in third to increase your average power to the ground during a run.

2005gxp

ahh, thought we had a 3.69 stock gear. so best to stay stock then. when i order my 15/16ths drive chain i will order it for a 3.29 gear?

evil5.3

i pretty sure the gtp comp g were the only car with the 3.69 but not positive

DieselPump

iTrader: (8)

the comp g was the only car that came with the 3.29 gears.

GTP's and GXP's all came with 2.93 gears.

2005gxp

so whats the best gear for my car?

supercatxr7

iTrader: (5)

I have 3.29's GM 1" racing chain set up.

2005gxp

what would you recommend? im getting a 15/16ths chain

CenTexSS

iTrader: (2)

His 11.01 @ 126 would make me think the 3.29's are good!!!

I don't think anyone who has done the 3.29's have regretted it though.

blakss

iTrader: (4)

lucky Muthashutyomouf !

blakss

iTrader: (4)

you need to completely rebuild to swap gears and chain? and tuning correct?