rear diff size? stupid question
 

sure there is a simple way to look under your truck and see if you have 8.8 rear or 7.5 rear but i dont have any clue. tried lookin online and they made both for my year. anyone know off hand or just give me a idea what to look for. got my 35s on and need to re-gear pronto!!! thanks guys

What's your door tag say under axle code? There should also be a tag on one of the differential cover bolts.

being that you have a 4.0 it should be a 8.8

Yeah, it sure should. Helps to read signatures.