4.11??

[GreaseDog]

True, not much for us humans to notice but mechanically it makes a difference.

I ran the rpm formula just to check it out because I am curious by nature. If you were driving 40 miles per hour with 33" diameter tires, the engine rpm's would be 1,674 with 4:11's and 1,670 with 4:10's. Very minimal indeed, but the drive train would notice the difference if being driven on pavement.

Which is why ford trucks are commonly shipped with 4.11s in the rear, and 4.09s in the front... It doesn't make enough difference for the factory to not put a warranty on it.