best ratio for the auto or best for gas? Thats the big question

 

4.10s didn't take away any noticeable gas mileage. At 80 MPH I was running 2050 RPM with 3.42s, with the 4.10s I'm at 2400. Not much difference. Around town you can still select your RPMs to keep it from reving, you'll notice a little difference on the highway... it gets up and moves.

I don't take it to the track but I do run the canyons with ZO6s and Subaru WRX STis... no prob! It has good throttle steer and keep the power in the sweet spot.

 

I installed 4.10 gears recently, and i really love them. Much more fun. I drive my car everyday to work, short distance. Not much difference in rpms on the highway for me. Good luck. Fred

 

Do any of you run Nitrous with a t56 and 4:10's? I have a 383 and a NX wet kit and would like to know how well the 4:10's act with the juice. Thanks.

 

i see you had 3:42 so your a m6 i imagine. Im have an auto and wanna know how it is with 4.10s

 

I just got 4.10's and I love them. It's not as big a difference as I thought it would be, I don't know if 3.73's would even be noticeable.

 

I've had 4.10's in mine for 3 years...Even when it was a daily driver. Last year with the stock motor/exhaust manifolds, it ran 12.82 with them. With the head/cam combo I've went 12.25 @ 111 MPH. I go through the traps at 6000 RPMs...In 3rd gear...With 26" tall tires.

I cruise at 2300 RPM, in O/D with the A4 @ 60 MPH

I get 18+ MPG with a car that runs 12.25

Frank