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post #1 of (permalink) Old 09-30-2006, 08:36 PM
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gear oil on hub, what to do? - \'82 CJ

Hello all,

Well I had a mechanic replace my rear pinion seal on '82 CJ8; it was leaking bad.

About a month later, I thought my rear right wheel cylinder was leaking & I pulled the drum off. After cleaning it up, it looks like it is leaking from the outer seal on the axle.

Is it OK to replace just the outer seals on this rear end?

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post #2 of (permalink) Old 09-30-2006, 09:44 PM
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Re: gear oil on hub, what to do? - \'82 CJ

You should have an AMC20 rear axle (Smooth dome shaped cover), which has greased axle shaft bearings.

There should be a seal inboard of the bearing to keep the gear oil out of the bearing and an outboard seal that keeps the grease in.

If the gear oil is leaking past the outer seal I would suspect the inner is bad or maybe even missing.

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post #3 of (permalink) Old 10-01-2006, 08:01 AM
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Re: gear oil on hub, what to do? - \'82 CJ

Is that a big job to replace both the inner and the outer seals? Would you recommend replacing the bearing at the same time?

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post #4 of (permalink) Old 10-01-2006, 08:51 AM
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Re: gear oil on hub, what to do? - \'82 CJ

CHECK THE VENT! It should be on the top of the axle - often where the brake lines connect - on the junction block. Sometimes it's a cap looking thing, sometimes theres a hose on it. Unscrew it and clean it.

The air in the axle housing expands with heat. It has to go somewhere, it's going to get out somehow. Normally it goes out the vent, but if it's plugged, it forces it's way out the pinion seal or axle seals taking some oil with it.

It may be that simple!
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