3.73 vs 3.42's in M6
 

I was wondering what difference in acceleration and top speed I will see if I go from the stock 3.42's to a 3.73 set up in my 02 M6. I know acceleration will go up and top speed will lower but will the change in either be very noticeable? I was thinking of 4.10 too but Id rather stick with something that will maintain reasonable gas milage. What are your thoughts?

3.42 to 3.73 will help but I wouldnt bother unless you NEED to replace gears. 4.10 will really wake up the car and with the deep 6th gear gas mileage will still be decent

have you tried either on your camaro? any one with an M6 and 4.10s what kind of gas milage?

I would keep the stock gears or go 4.10's. I just put a 12 bolt in with 3.73's granted the gear is better than the 3.42's but not by much. I was a little disapointed with the 3.73's. The 3.73's are better than stock especially with the cam, but not exactly what I expected.
I am getting 4.10's put in next week so I'll be able to have a good comparison.

Go with the 4:10's. 3.42 to 3.73 is o-k but if your gonna invest $$ into getting gears i'd go for the bigger increase. just to be warned kiss any traction you had before goodbye, and with a 10bolt it will be even more easy to break with the lower gearing. however you gas milage shouldn't drop more then 1 or 2 mpg. -Jim

if you want performance go with 4.10s. i just put 3.73s in my m6 t/a and i lost 3 mph and 4 tenths in the 1/4 mile. 4.10s are the best gear but the break easily because i have broken 2 sets of them. no real difference in gas mileage unless you are doing alot of city stop and go driving. i wish i had the 4.10s back in my car but for now i will have to live with the 3.73s

thanks for all the good advice. I really appreciate it. I'll have to spend the next few tanks of gas deciding what I wanna do.

I'm assuming you lost the 3mph and 4 tenths when you went from 4.10s down to 3.73s, correct? :suspiciou

You wont feel the difference between them ,,,, wake you Z and go for 4.10

Go with the 4.10's, I love mine!!!!
Gas mileage is still great/ Got 26-28MPG going 80 MPH Most of the way on my 500 mile trip to NJ for SLP Day at Englishtown Last October!!!