Seems like 4.10's were the gear ratio of choice for the previous model mustang. Given the larger wheel diameter of the '05's (and the 3.55's stock gears to match), why is everyone still going with 4.10's? Why not 4.30's? :scratch:

 

Seemed like an acceptable RPM for cruising at 70-75 on the highway and still getting a kick in the pants on the way up there.

 

 

I wouldn't go past the 4.10's....especially if you're gonna do a ny major mod work....80mph runs ya almost 3 grand on the tach with the 4.10's as it is....the 4.30's would all but prevent the car from being driven at hwy speeds anywhere.....just working way too hard to do it at that point....

 

Now 4.30's with some taller street slicks....