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Thread: Final drive output bearing

  1. #1
    BMWNUT grw's Avatar
    Join Date
    Apr 2005
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    Portland, OR
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    105

    Final drive output bearing

    Update: Never mind. I found the info in the Clymer. The Haynes just says "take it to your dealer." I should have checked the Clymer, too. Sorry for the noise.
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    The first time I had a leak from the final drive seal I bought a seal and installed it (actually I took everything apart and had the local dealer's shop install the seal). Afterwards I reassembled the FD and the leak was gone.

    Gone until the FD failed on a road trip last year. The output bearing (the big ring ball bearing that supports the wheel side of the crown gear) chewed itself in a a zillion little pieces and destroyed the seal. All the oil ran out and we were stranded in Twisp, WA. As it turned out we were around the corner from an ex-MOA who rescued us. But that's another story.

    I concluded that the reason the original seal leaked was that the bearing was beginning to fail and it distorted the seal. I could be wrong. My point is that my replacement FD (purchased on eBay) is now leaking from its seal. Rather than replace the seal I would like replace the bearing and the seal.

    Question is: How do I remove the old bearing from the crown gear and how do I install the new one? The seal job is easy now that I see how it is done so I can handle that. But the bearing appears to be a challenge.

    Any information or advice appreciated.

    -Gary

    PS - When I posted about having the original FD rebuilt at Bruno's I changed my mind and bought a used unit to save money. Sigh.
    Last edited by grw; 05-25-2012 at 04:40 AM.
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    Gary Wasserman
    MOA#38120 DoD#0216 Airheads#12166 BMWRO
    '85 K100 / '83 R80RT

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