Join Date: Sep 2003
Location: Flushing Michigan - Genesee County
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Re: Changing gear ratio
Oh yeah, of all things I forgot to mention that you will damage your 4x4 system if you install two different gear ratio gearsets in the front and the rear. Bad idea. I know there are hardcore offroaders that do this on occasion to get more pull from the front of the vehicle than the rear, but it only works in really slick stuff.. as soon as it catches traction, things will break.
Think of it this way, your trucks transfer case does not have its own differential unit in it... which means your front wheels cannot recieve less power than the rear wheels at any time 4x4 is engaged. They get the same power front to back. So if you have 3.73's in the rear, and like 4.56's in the front, and you try to drive on somewhat dry ground the front wheels will move slower than the rear wheels causing binding. When that happens, something in the system has to give... could be a u-joint, axleshaft, ring and/or pinion, or even the transfer case could bust (it only has an aluminum case!). If you want to regear one at a time, just keep the 4x4 lever in 2HI. As long as you wait until both are regeared to use 4 wheel drive, everything will be fine.