Rear

An external leak of lubrication from the hub seals can be caused by a faulty internal seal. For example, if the internal seals separate the differential from the hubs are faulty and the vehicle is operating or parked on an embankment. Oil from the differential may flood one hub causing a leak and leave the differential lacking lubrication.

When a seal is found to be leaking check the axle ventilation system, as a blockage can cause internal pressure to force oil past the seals.

See "Description and Operation" for illustrations of oil seal locations. Description and Operation

When investigating hub seal leaks check the grease for dilution with oil. Check also the differential level and oil for metal particles and the condition of internal seals.

If the vehicle is driven in deep water with defective oil seals, water may contaminate the lubricants and raise the differential level giving a false impression that the housing has been overfilled with oil.

Do not assume that a high oil level in the differential is due to over filling or, that a low level is because of an external leak.