Yup they just gave the truck back to me and said that'll be $1100, and then i was off and going. I wasnt hard on the diff when i first got it setup. Im just worried that the fluid not being changed for the last 12k miles might have hurt it,

I read somewhere it was probably gray because water got in there, ive never crossed any streams or anythings, but ive been in some deep water holes, i guess it got contaminated, im sure itll be alright though, diffs are pretty tough, i guess what happened wasnt exactly ideal.