ucinn

After reading through everything I could find on here about gears, I'm still confused.

On the 3.7s..what seems to be the best gears to get for the automatic vs. the manual? I have the auto with the stock 2.73's Thanks in advance for your input.

Derf00

autos in 05+ mustangs have a higher first gear (and second gear in some instances) than their manual counterparts, therefore typically you will find the max for each as:

Auto: 3.73
Manual: 4.10

jordanair45

Hm, might have to reconsider! Still on the fence in regard to gears for my auto. 4.10 or 3.73. I heard 4.10 is overkill and I might actually lose performance.

Siber Express

If I had 2.73 in my car and was going to do gears I myself would not go any bigger than 3.55.
I do not drag race, I road race so a 3.73 gear makes you shift more, the 3.31's I have now are just a little off for what I do but in most cases 2nd and 3rd are most used.
Also I always heard the other way on the gears, 4.10's are for an auto and the 3.73 were for the manual. First gear is already a waste with the 3.73's and a manual trans IMO.

JimC

You have to consider the gearing in the transmission when looking at the rear end gears. With the automatic, anything over a 3.55 rear end makes 1st gear pretty much useless. The car will shift quickly out of first before you can get through an intersection.

jek58

Just installed 3.55s in my auto very happy so far with them .Prefect for highway driving lost a couple of mpg but the fun factor is woth it for sure

jordanair45

Very nice. This thread has me reconsidering. Gears are next for me!