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Thread: Mystery Final Drive Fluid

  1. #1
    Registered User
    Join Date
    Aug 2006
    Grand Rapids, MI

    Mystery Final Drive Fluid

    In the process of winterizing my 2007 R1200GS for the first time (just purchased a year ago) I drained the final drive. What came out was a red fluid that looks like automatic transmission fluid. Anyone have any ideas on anything like that that might be used successfully in a final drive?
    The bike currently has 93,000 miles on it so I believe the previous owner knew what they were doing when they put whatever fluid this is in it.
    87 K75S
    previous 2008 R1200R

  2. #2
    Still plays with trains. tinytrains's Avatar
    Join Date
    Oct 2009
    Torrance CA
    The red color was from assembly lube.

    See this discussion a few lines below about what fluid and amount.

    2009 R1200R Roadster

  3. #3
    SURVIVOR akbeemer's Avatar
    Join Date
    Jul 2007
    Silver City, Montana
    93,000 miles..... assembly lube.....
    The Outpost, Silver City, Montana
    Team Pterodactyl
    2018 Ural Gear Up, 2017 R1200GSA

  4. #4
    More than one company sells synthetic gear lube that is red. Not surprising, Redline is one of them, although Redline Heavy is a thick pink that resembles Pepto Bismol. At one time the private label stuff sold with the BMW logo was red. That was a few years ago though.

    What it is is of little importance, other than as a curiosity. The important thing is to install a GL5 rated gear oil of the specified viscosity.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell

  5. #5
    Registered User pappy35's Avatar
    Join Date
    Nov 2017
    Collierville, TN
    There was a thread on one of the forums recently asking the same question. I don't recall the specifics but there were two or three different brands mentioned that had a red color. I wouldn't worry about the color, just make sure you use the correct viscosity and amount (I believe it's very important not to overfill) and have fun riding it.
    '13 R1200RT 90th Anniversary Edition

  6. #6
    It may have been ATF, who knows for sure at this point. Even if it was ATF I wouldn't worry about it. It is not like these drive lines are highly stressed.

  7. #7
    Registered User bobvalrod's Avatar
    Join Date
    Jun 2009
    Deptford, NJ
    My guess based on info provided is that it's Royal Purple gear oil. I've used it in FDs for years with success.

    2005 K1200LT

  8. #8
    got, got, got no time... rguy's Avatar
    Join Date
    Aug 2003
    Rogersville, MO
    Most likely this stuff. Excellent juice for your tranny but not necessarily for the final drive although many use it for the FD.IMG_20181204_142554_366.jpg
    Neal - '16 R1200GS / '81 R65
    Be the person that your dog thinks you are.

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