what do you think the top speed would be for a trans am ls1 (automatic) after a 3.73 was installed? I also have exhuast and hypertech power programming. Havent a had the chance to top it out yet thats why im asking for an estimate

depending if you can go into OD or not. I assumed that. I wasn't sure on what the exact ratio is on the OD in an A4 car...but I put in .74

Final Drive. 3.73
Top gear. .74
Max RPM. 5900
Tire size. 26"
Max Speed. 165.4 mph

http://murray.faithweb.com/formulas.htm#

Anything you could want to know :wink:

what is the stock tire size ?

what is the stock tire size ?

I'm not 100% sure...go out with a tape measure and find out :wink:

I don't have one on me or I'd find out.