Final Drive Death

Discussion in 'GS Boxers' started by bemiiten, Jul 11, 2005.

?

How did your failure happen?

  1. No notice at all ,left me stranded on the spot.

  2. Noticed a problem ,but was able to ride back to civilazation

  3. Just checked and felt fine ,but died a few hundred miles later

  4. Noticed problem,rode bike hundreds of miles without total failure

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  1. (none)

    (none) poser

    Joined:
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    If you are expecting dealer part prices to be the same as internet part prices, you have a few things to learn.

    Also, you want to sue BMW over a 8 year old bike, 5+ years out of warranty? Ok, have fun.
  2. veloct

    veloct Adventurer

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  3. bzrider

    bzrider Long timer

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    ITS GOT THE WRONG SHIM IN IT .the crown bearing is gat to much preload it is a bearing that requires none the tapered bearing is loaded ,but over preloaded it will burn up the crown bearing,
  4. bzrider

    bzrider Long timer

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    this method works but if you dont keep the housing good and hot when you take the measurement you can get a false reading make sure you take it multiple times until you get he same measurement .05 mm of and the bearing will fail early.
  5. tagesk

    tagesk Tuscan rider

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    [​IMG]

    In the parking lot of a hotel in Alcoi, Spain. Got the old one pulled off at a shop in town. New bearing
    promised in Alicante tomorrow morning.

    Oil changed 2.000 km ago with no sign of problem.
    The bearing lasted 100.000 km.
    High velocity travel with passenger and lots of (her) luggage is the norm.

    Two days delay because I didn't have the bearing with me, but must wait for it to arrive.
    No big deal.

    [TaSK]
  6. Anorak

    Anorak Woolf Barnato

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    Wut?

    What if you had to be back at work in less than two days? what if you were crossing the Atacama desert?
  7. (none)

    (none) poser

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    Looks like the input shaft seal to the FD might also be leaking
  8. TomDac

    TomDac Been here awhile

    Joined:
    Oct 21, 2009
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    Location:
    Hayward, CA
    last year when I got my 6K mile service, they noticed the pinion bearing "had some play" and recommended I get it replaced before it fails... I inquired just how much play and would it be wise to replace it right away.. They said it could probably wait till next year.. So, I just got it replaced over the weekend.. No failure (thankfully) but still $500 I didn't want to spend.. Grrrr.

    Hopefully it'll be fine for many more miles and I won't ever have to worry about it.
  9. tagesk

    tagesk Tuscan rider

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    No big deal FOR ME IN THE CURRENT SITUATION.
    If I was in a desert I would have brought a bearing, a seal and a puller.

    As it is, I rode to the nearest town, pulled into a hotel, had an excellent dinner, and am now
    waiting for the parts to arrive.
    No big deal.

    I am in no way condoning the design of the FD!

    [TaSK]
  10. tagesk

    tagesk Tuscan rider

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    Might be, but everything was severely spreyed with oil so it is hard to tell.

    Thank you for alerting me; I'll clean it and keep an eye on it.

    [TaSK]
  11. JimVonBaden

    JimVonBaden "Cool" Aid!

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    That is the attitude of an adventurer! Even break downs are part of the adventure, so why not go with it?:evil :freaky

    Jim :brow
  12. StYd

    StYd Been here awhile

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    Mine too. My sister actually noticed the grinding noise on a lunch ride. No wheel play, top to bottom or side to side, but a noticeable grinding noise on rotation. Got the drive apart, and the bevel gear inner bearing is toast. Got all the bearings and seals on order, and am hoping they dont take too long to get here. About 300$ in parts.
  13. rinho

    rinho Rinho Féroce

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    first of all, I don't know all technical word for all these parts...

    Mine fails (2 years ago) because the inner part of the bearing on the of the pinion had slide a little bit and had started to grind the diff case (I was told if happens frequently)
    Resulting in an oil pollution and the bearings "beginning of the end"
    However I was able to ride several hundred KM without being worried

    Leak appears right after a highly muddy weekend (GS Challenge)...
    Maybe the leak had nothing related to the diff "on his way" failure, but at least it helps me see it before it turn into drama.

    I replaced the part myself, but I bring the diff to be adjusted by a BMW mecanic master.
    IMHO, the preload adjustment is the key to have the diff lasts long.
    I even think the preload should be re-adjusted during the bearing life
  14. Anorak

    Anorak Woolf Barnato

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    It's all part of the adventure. Why not go with it?

    Because it's trouble and expense you shouldn't have to deal with.
  15. def

    def Ginger th wonder dog

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    I agree...if the preload is set correctly and lubrication is maintained, a FD failure probability is dramatically reduced.
  16. rinho

    rinho Rinho Féroce

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    Right, and that's why I change the diff oil when doing the engine oil... to check and be sure the oil is not contaminated
  17. Enprize

    Enprize Adventurer

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    Pullers are nice, as you can see from my photos I had to chisel mine off half way down the copper canyon! Next time I carry a puller too.
  18. MotoPerro

    MotoPerro God Bless Texas!

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    On two oilheads with ~70K combined no failures yet, but it's always in the back of my mind. I bought BMW so that I would NOT have these types of failures. Lately, I've been re-thinking the simplicity of the chain. Chains typically don't just fail and leave you stranded. You get plenty of opportunity while cleaning and lubricating to inspect sprockets and chain for wear. If you don't take preventive action, then shame on you (or me!). Just MHO.
  19. kubiak

    kubiak Long timer

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    i always thought if they had a belt drive on the gs that would be nice, they would have to enclose it somehow though to keep debris out. then just carry a spare belt if it ever needed one.