Originally Posted by dn37110

i have always been told to use 4:10 with auto and 3:73 with 5 speed. I have a auto with a 4:10 and my friend has manual with 3:73 and we stay pretty competitive with each other

Originally Posted by One Bad Stang

+1000 on finding a good shop/mechanic to install the gears. i am still going throug a battle with the original installer of my gears. they tried 3 times before i took the car elsewhere, only to find out they (the original installer) had messed up the install so bad the pinion gear had cut a new groove into the ring gear. it has been a complete nightmare, but the original shop bought me a new set of frpp gears, and i am still working on reimbursment for the cost of diagnosing the issue and installing the new set of gears.

but aside from the noise issue i went through/am going through, the gears themselves are great! i chose the 4.10's and i love them. 2300 rpm @ 65mph on the highway, great accelleration arround town and on the highway, and another factor for me was that 3.73's probably wouldn't have been much different from the stock 3.55's my car came with. i wouldn't take a cross-country road trip with the new gears, but they fit my daily routine perfectly.

Originally Posted by candymanjl

it depends how much power you're going to run. all motor and the 4.10's may work out well for the strip. boosted or spraying a big shot and the gear may be a liability. if you loose traction or have to make an extra shift it may not help your time.

Originally Posted by Lankers

That's kind of what my thoughts were too. I don't want to have to shift so fast I lose time on the track, but at the same time I didn't think it would be worth the money to get 3:73's from the 3:55's. Thanks for the input guys. I will probably have the local Ford dealership install them.