Originally Posted by mSaLL150

Trails are basically same tire as Toyo MT. I couldn't stand the performance blow the Toyos had on my truck, and I have Troyer 91 tune and 4.56 gears. The problem is that the tires are so damn heavy and high load range, truly not very practical on an older half ton truck. I ended up switching tires to a more lightweight (16 pounds per tire!) but still aggressive AT tire and gained 3mpg back and much more pep. Huge rolling mass is killer on these older F150s with 4 speed trannys.

If you decide to do gears, I would step up to a 4.56 since you have the smaller engine. RPMs won't be bad on the highway unless you are doing 85, and around town will be a lot better.

EDIT: just looked it up. Your tires weigh 72 pounds each. Thats easily 22+ pounds over stock per tire, not to mention they are larger in diameter, wider, and have a more aggressive pattern for increased frictional resistance. That's rough on an undergeared drivetrain.

Originally Posted by jerrybizzle

I actually got a really good deal from a local off road shop. I paid 940 with the gears, install and diff fluid. No master install kits as truck only had 60k on it. The shop owner said I shouldn't need them with the lower miles. I kept stock LS as I don't really off road. They resealed the diffs with black rtv silicone and hasn't leaked at all. Most spend around 1500 with install and the master install kits.

Originally Posted by Ballin STX

I would say you got a DEAL... I just got quoted locally here 1800$ front & rear...

Originally Posted by jerrybizzle

From 4wheelparts? That seems to be about the going rate from the chain stores and with master install kits.