Rockjunky317
Active Member
i have a np 231j its on a 2000 tj i bought this jeep back in april right after i bought it i drove to cedar city, after that trip when i was crusin around 40 it would start to make a grinding noise i blew it off suspecting it was the 8 inch lift with no short shaft, i have which installed a ESS from Teraflex and now when im on the freeway it is fine when i hold near fullthrottle but when i slowly release the throttle it will make a violent vibrating/grinding sound ay ideas?