Yes tires are pricy but maybe he could borrow a set to see what the effect is instead of changing the gears, pay out the money and then find out it isn't what he wants.
2500 - 3000 is a good cruising rpm for the 3.0, I find the with 4.10 s and 33" tires I am doing around 65 at 3000 but that not when the hills come in to play.
The problem is there are a lot of variables, tire size, weight and as stated what is expected from the truck.
3.73 / 4.10 = 0.90, this equates to a 10% reduction in rpm on paper so 3000 should be 2700 but then the variables come into play and how the truck is driven.
Reduced gear ratio results in less power in the seat of the pants, so the results is usually more gas pedal and in turn less miles per gallan.
Test out some tires from friends, try two sizes larger, then four, just to see the effects.
A gear change is not as easy to do compared to changing tires.
4x4, 5sp, Std Cab, Stepside, E4 Red
4” Lift - Coil-Overs, 6” SkyJacker Leafs - No Blocks (Mistake)
31 Spline FX4 Rear Axle, 4.56s and OX Locker, Hurst Shifter w/Optional Stick and "Made by Grev" alignment adapter
Last edited by Scrambler82; 08-21-2013 at 03:34 AM.