02MustangV6DD

How do i tell what gear ratio i have? Doing 70 i am right at 2000RPM. I am guessing they are 3.55's I want to install the same ratio in my new rear end. How can you tell by lifting the rear end and turning the drive shaft? 1 full drive shaft turn would spin the wheels how much? I work every day so i dont have a day to rip out my old one and put them in my new rear end.

TrimDrip

Jack it up and see how many times the driveshaft turns a complete revolution for one wheel revolution. 3.5 turns should be what it is for 3.55s.

They also make calculators for this.

02MustangV6DD

Ive been looking for one all night but cant find it

TrimDrip

try richmond gear calculator