??? Finally made it over to this forum. Need some help/advice diagnosing the problem with the excessive slack in my drive line, specifically the rear. It's a 91 w/ 205k. Checked the u-joints-good, was just into the rear diff to change out the rear seals and wheel bearings and found no sign of excessive wear or play (no metal shavings, ring and pinion were in great shape, no leaks, clean diff fluid). With the truck level and in park, I can rotate the rear drive shaft about 3/4 of a turn before it catches. No side to side play in the shaft. No noticeable problems in the transmission (noises or shifting). Can anybody point me in the right direction? X-fer case? Tranny? or is ti the rear diff? I want to install an ARB in the rear but need to find out if it is a diff rebuild I am looking at or something more serious before I spend precious #6 funds on the locker. Thanks for any and all assistance.