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Old 12-02-2013, 12:04 PM
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Rear wheel bearing / oil seal question for the mechanics out there ......

Ive recently done the job, it was actualy the oil seal that was failing and leaking oil over the rear caliper, the bearing was fine. But as you know you have to grind off the bearing to fit the new oil seal.
I read this was quite common on the WJ's.

So this got me thinking how does the oil seal keep "lubricated" on the running "lip" to stop it over heating and wearing away ?
I assembled the seal with a little diff oil on the running lip, the bearing is pre-oiled out the packet.
So does the wheel bearing and oil seal rely on the diff oil moving down the axle to lubricate them ? And if so, then having a low oil volume in your diff would cause the premature failure of the wheel bearing and / or oil seal ?

Just a thought....
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