i had a ring gear bolt come out the cover and trashed the rear end. i had 4.10's in it, those things were the worse things i could of ever done! the 3.73's feel a whole hell of a lot better! i went against my instinct and got talked into the 4.10's, i wont ever go against it again. the pinion gear was trashed unfortunatly, they were supposed to go into doc's mach. oh well, **** happens.