New Gears in the Rear for my 2004 !
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#4
I don't know whether you are being sarcastic or not, but you would be surprised how many people don't even think about this issue and assume you can change just the rear gears on a 4wd. You said that you "want to upgrade the rear end". Sure, you can do only the rear end, but you should pull the front driveshaft and use it as only a 2wd truck. If you put it in 4wd, you will break something expensive.