Next week, I will be opening the other can of worms on the rear of the XJ. Symptoms: Growl/Grind noise between 30-40MPH on Decel. Same noise on neutral (Speed holding) loading. FSM (Factory Service Manual) points towards the Pinion Bearing on the driveshaft side of the pinion gear as a failure. So, look forward to another fact filled, photo stuffed article from me in the near future.