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Thread: K 1200 RS transmission rear output seal problems

  1. #1
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    K 1200 RS transmission rear output seal problems

    I am having a hard time getting the output seal on the transmission to stop leaking. Replaced the seal, and it still leaks. Any suggestions?

  2. #2
    Registered User jzeiler4's Avatar
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    That should be the same seal as on the K1200LT a 25x40x6 (Yup checked the parts list). I have had better success with a Timken 25x40x7 (My Napa parts guys order them from a jobber some where) but the depth you install it is critical. Here is a tool my machinist made me for installing them correctly. Best to install dry.
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  3. #3
    BMW Rider
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    Quote Originally Posted by jzeiler4 View Post
    That should be the same seal as on the K1200LT a 25x40x6 (Yup checked the parts list). I have had better success with a Timken 25x40x7 (My Napa parts guys order them from a jobber some where) but the depth you install it is critical. Here is a tool my machinist made me for installing them correctly. Best to install dry.
    Also, if I'm not mistaken BMW released a revised tool to drive this seal to a different depth than the original. Check with your dealer for further info.

  4. #4
    Registered User jzeiler4's Avatar
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    Quote Originally Posted by billy walker View Post
    Also, if I'm not mistaken BMW released a revised tool to drive this seal to a different depth than the original. Check with your dealer for further info.

    Thanks for the info but my tool was not based on the factory tool just a depth I prefer validated with an open tranny case to set sealing lip placement on the shaft. Plus the Timken seal has two lips vs. the factory seal's one. I have installed several at this depth with no issue. But next time I am at a dealer with my calipers I'll check their tool.

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