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Alright guys here is my dilema. I have an 05 Crewcab 1500 Z71 with the 5.3 in it with a 6" fabtech lift and 35" KM2's. I am looking for the correct gears for the truck. hard to do since im in the desert. it has IFS up front. What size is the IFS and rear housing? ive been reading alot on the yukons and motives and need some help chosing between 4.56 and 4.88 gears. i tow a 24' enclosed race trailer on the weekends and it kills it right now. and what is ur guys' best opinion on gear size. thanks for the help. im hopin the rear has never been swapped. help on rear and IFS size and gear choice please. thanks guys. Chris