* The auto hub may be damaged. If the auto hub is damaged, it may not be able to properly engage or disengage the 4 wheel drive system. This can cause the gears to grind when you shift from reverse to automatic transmission.
* The auto hub may be dirty or corroded. If the auto hub is dirty or corroded, it may not be able to move freely. This can also cause the gears to grind when you shift from reverse to automatic transmission.
* The auto hub may be out of adjustment. If the auto hub is out of adjustment, it may not be able to properly engage or disengage the 4 wheel drive system. This can also cause the gears to grind when you shift from reverse to automatic transmission.
If you are experiencing a grinding noise when you shift from reverse to automatic transmission, it is important to have your vehicle inspected by a qualified mechanic to determine the cause of the problem and to have it repaired.
