fccs

iTrader: (26)

Hey im trying to decide whether to go with a 3.7 or 4.10 gears what I want to know now is the the rpms you guys are turning at 3.70 and 4.10

What is your rpm and mph for the following:
1. When do you enter 2nd gear at what mph?
2. How many rpms are you turning at 70mph in 6th gear
3. What seems to be your max speed

Say what gears you have and see if you can answer those questions. Thanks this is going on a 98 m6 trans am btw

staringback05

iTrader: (8)

with an m6 car the 4.10s arent a bad choice....youll still have a good top end

kebie05

iTrader: (4)

how do gears affect gas mileage?

fccs

iTrader: (26)

i dont think it should much..just keep the rpms low same thing i just wanna have those questions answered by someone with 4.10s perferrably..

fccs

iTrader: (26)

is this a hard question or something?

fccs

iTrader: (26)

bump...

BigT2002

iTrader: (2)

I would say check the Gears & Axels topic on here. There is a sticky that explains them. The higher you go the worse your gas milage will be because your at higher RPMs.

blue02formula

iTrader: (1)

I have 4.11's in a 12 bolt. You will lose about 2mpg city and highway. I turn about 1900rpm going 70mph in 6th if I recall correct. I know in states where the speed limit is 70, I set my cruise on 78mph and it sits at 2100rpm and I average 25mpg. It is worth it to me, it felt like a whole new animal compared to 3.42's. I wouldn't waste money on putting them in a 10 bolt.

darrensls1

Play with this calculator. It'll help you decide which gears are best for you.

http://www.f-body.org/gears/