Hi bamaford,
We need more information. What is your differential ratio? What is your tire diameter?
If you have something like a 3.73 Diff and you put on 30" tires (or more), this will kill off line performance. With such tires, you should change to 4.10 gears or go to smaller tires. Your off line performance will really improve but highway gas milage will suffer.
hey david if ur using the rims and tires i just sold u,the 28 tires are 2 in bigger then standard size,get new originals size tires and it has git up and go,i wouldnt switch to 4.10's u may get a power increase but gas will drop by 2 or 3.
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