Another 2pm idea if you get a 44 with manual hubs just put the tcase in 4lo and unlock the hubs 2lo right there or put manual hubs on whatever axle your getting
2hi would work cause its only using the shaft nothing is ingaged and no fluid would not change this it sounds like somethin is out of wack like loose chain or bent broken forks etc
I disagree there a guy on here that has a 383 pushin 500horse with the 30 up front and amc20 rear runnin 38 for ten years and put over 16000 offroad miles on it
The thirty built will handle it the 8.8 is good upgrade the tubes will spin just weld them plus you get discs and superior makes a supet 88 kit thats nice