gear swap

I am trying to build a 4x2 ranger as an off road truck and I have gotten bigger tires. I have on now 30 inch tire and feel no power in 5th gear.. my first thought is to swap in a different axel or at least the gears.. I am trying to find axel code 89 and was wondering if anyone knew what...

There are a few charts out there showing the RPM’s that you run with certain axle gears with certain tires at a given speed. I used one of these such charts from one of the posts I stumbled across on this website a long while back. Sorry, I don’t remember where I found it on here. I got tired...

I've unexpectly had not one but two sets of 7.5 gears fall into my lap and now I'm not sure which set to run. I get to choose from 3.73 or 4.10's. Truck details are in the sig. It currently runs 3.54 gears and stock 205/75r14 (26x8) tires. Since moving to the city I don't plan to change tire...