Can we change trans gearing?

[ChitownM3]

Quick question, is it possible to change the trans gears in this car? The reason I ask, is because I HATE third gear. Our cars get trounced in 3rd gear on the highway every single time. I feel that going to 110mph in 3rd is way too long, and would like a gear that would take the car to a max of 95mph in 3rd. I don't want to change out the rear end because I believe 1st, 2nd and 4th gear are all pefectly geared.

[satinghostrider]

Doubt it. Closest I think you can do is to change your final drive.

[saeedg48]

seriously a tune would help make 3rd gear more punchy but idk about completely changing redline.

[ChitownM3]

Originally Posted by saeedg48

seriously a tune would help make 3rd gear more punchy but idk about completely changing redline.

Car has a tune, exhaust, pulley and filter. Doesn't change the fact that 3rd gear is still a dog due to the fact of how long it is.

[J08M3]

Originally Posted by ChitownM3

Car has a tune, exhaust, pulley and filter. Doesn't change the fact that 3rd gear is still a dog due to the fact of how long it is.

change the rear diff gears.... much easier and will probably get you the change you're looking for

[ersin]

Originally Posted by J08M3

change the rear diff gears.... much easier and will probably get you the change you're looking for

+1. I've never heard of anyone changing just one gear ratio, but can't say for sure. I think you'd have to replace the whole transmission.

I don't know of any E9x M3 with a different final ratio other than PencilGeeks. But in other cars it is a difference that you can most assuredly feel. And you benefit in every gear. You may lose a little mpg if you go really radical, but the M3 already sucks in this regard. I think you can keep your BMW trick M3 LSD and just swap the gears. Check with Dinan. And I'd try a 4.10 if I were you.


Cheers.