Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hi Richard, My name is***** will be glad to help. Jack up the vehicle and check the differentials for binding individually and for metal in the drain oil that would indicate a broken gear tooth that might be getting jammed occasionally when pulled from the bottom of the oil. If that is okay refill and move onto the transfer case and check for the same. Finally check the transmission for burnt oil and metal/debris in the pan. Let me know
Service all compartments using a clean drain pan for each and see if there is any signs of failure and if you find any metal using a magnet in the oil or reservoirs.