Ive been experiencing some hard popping and grinding when going straight down the road ..ive replaced cv axles front.rear bearings and all ujoints...i assume its in my rear dif ..as i also think it could be something wrong with mychoice of ride.but ive had this thing for 2 years now and love working on it..just stumped and need to know if anyone can help me fix this.. Thanks

Daily driver on 31's

249 transfer case
just replaced this