skinbrain

i need some help picking gears for stock 10 bolt with m6. can't decide between 3.73-3.90-4.10. car is pretty much daily driver, but makes about 20-25 passes a year. do you lose gas mileage with the 4.10s, on the highway? also wondering if a rear end cover girdle is worth the extra money? will it help the rear hold up to harder launches with drag radials? thanks for any advice

OctaneZ28

iTrader: (6)

While a TA Girdle does beef up the pumpkin a little, the rear end is still a weak 10-bolt.

4.10s are the most common choice for an M6 car, but keep in mind a numericly higher gear ratio will get worse gas mileage.

ohsofast

iTrader: (6)

You have to use 4.10. With that 6 gear you will hardly notice difference on the highway. Anything less in M6 is a waste of money. You should be asking 4.10 or 4.56 lol

hotrod79

4.10s 0r 4.56 doesnt effect gas milage much

skinbrain

thanks for the info. 4.10s going in soon.

mike2244

iTrader: (2)

with the 4.10 you will be at 1900 rpms at 70 mph in sixth gear. 4.10 is the way to go

skinbrain

is there much difference between the 3.90 and the 4.10s? if i,m at 1900 rpms at 70, will i be above 2000 rpms at 80mph in 6th gear? if i am will i lose alot of gas mileage? thanks for any help or info