dkuls@live.com

My '01 C5 vert makes 560 rwhp. Wonderful. Despite adding 325 30 19" Michelin rears I have a serious hookup problem. A twin disc performance clutch has been installed, diff and trans are stock. Being old of body (young at heart) any time I get on the gas, traction is lost and/or I hit the throttle limiter. I am thinking of switching the diff from 3.42 to 3.15 (built auto trans option). I don't do the work - will I notice a bit more time to control the gas/shift? Would like to hear opinions/experience in the change
thanks for your comments

frodo84

I would suggest stickier tires, then you can start breaking drivetrain parts . I don't think changing rear gear ratio would increase traction. Good luck.

martysauto

I agree with frodo84. 560 to the tires will break the stock parts. I suggest you get a trans brace, c6Z output shafts and clutch packs, then get sticky tires.

dkuls@live.com

Thanks for your replies. I agree that stickier tires would would help a great deal and talked to the Tirerack about options. In the summer, this is my DD, except on rainy days. Tirerack says that I have the 'best' tire for the vast majority of my driving and safety. The idea of running a higher gear ratio (3.15 vs 3.42) will provide a numerical reduction in available torque when starting in 1st gear and spread the power over a greater range of mph. The transmission brace is a good idea. We plan to use upgraded parts in the diff - Merry Christmas