StalkerGT

Definitely not worried about the fuel economy since I really only drive it on the weekends anyways...not like I will ever be going over the speed limit...sometimes lol

tinman

4.10's.
Not going to be enough difference in the fuel mileage to know it......

rmodel65

ive got 3.55's only because i found a tbird rear for cheap. but i would rather have 4.10s

harleylonewolf

just had 373s installed replaced 355s, added recalibration tool from ford, not much diff. between the sizes but expected some diff. especially bottom end torque, 1st gear lays down can't reach redline, just a dog any thoughts would be appreciated. 07 gt 4.6.

Duncan_GT

You're in the wrong section

dawson1112

You are in the wrong section, here is where you want to look

https://mustangforums.com/forum/2005-2014-mustangs-43/

However , I will tell you that going from 3.55s to 3.73s is minimal at best. Its like a 1/4 turn of the drive shaft difference , and only a very slight difference , so slight it may not even be noticeable.

As for it laying down it first gear , you may be reaching hitting the limiter a touch sooner. At what rpm does the engine take a dump? The rev limiter in those is designed to keep it out of the red. Im fairly sure the limiter is set to 6200 0n those cars, but if its cutting at say 4k or so check to make sure your traction control is off. Also I believe with a gear swap the ecu needs to be recalibrated on those cars.

9redfox3

Your going to want more go with the 4.10's.... Sometimes I could kick my self in the *** for not taken them when I had a chance ? I got 3.55's i'm happy with them but 4.10's will give it some bad *** pull !

StalkerGT

I may want to add a supercharger down the road...will 4.10's be ok with forced induction?

Duncan_GT

Depends. How much boost? I know a lot of guys that would go with 3:73. But, if you can get it to hook on the line, 4:10's with a blower would haul *****

StalkerGT

Yeah it would!! Can't wait to start doing major mods! My wife had a baby this year so it put everything on hold