well I have a 14 bolt in the rear with 4.88's so need to match the front back up . . has a dana 44 in the front with 4.88's but broke the ring and pinion the other week . . . .and 5.38's probably be a little better since I'm running 44's but I seem to have enought gear/motor combo to turn em anytime I want . . . so yeah . .