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#447480 - 02/21/09 04:05 PM Re: Discolored Trans. lube [Re: dave sawyer]  
Joined: Jan 2002
Posts: 8,287
SageRider Offline
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SageRider  Offline
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Posts: 8,287
Minden, Nevada
End result of discolored tranny lube being ignored (unfortunately, I was apparently the first to observe this symptom. Below occurred after 1K miles of additional hard riding.):






Michael
2010 Unrally IX Sierra Adventures Co-Chair
KE6GYC 2M/440
'12 F800-GS Trophy: (dearly departed)
'06 R1200-RT, Piedmont RED! (dearly departed)
'99 R1100-RT (dearly departed)
Minden, Nevada
#447505 - 02/21/09 05:01 PM Re: Discolored Trans. lube [Re: dave sawyer]  
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smiller Offline
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smiller  Offline
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Asheville, NC
Originally Posted By: dave sawyer
Update on my transmission.
Took the trans. up to Anton at Va. Motorrad in Charlotesville for inspection/repair. Once inside it was found that the Input shaft gear had pounded itself into the bearing and broke the bearing seal releasing the bearing lube into the the gear box. That' what caused the discoloration.

Yep, happens all the time, and those of us who have been there before already knew exactly what you'd find after seeing that gear oil.

This is a pretty serious design weakness of the 1100 transmission. The helical drive gear directly contacts the bearing inner race and isn't even fully supported by the latter, and my theory is that the problem is greatly exacerbated by the wave washer installed in the later models which allows the gear to move back and forth on the shaft and slowly hammer the bearing to death. Some of us have removed the wave washers from a few transmissions and time will tell whether this has any positive effect.

In the meantime I would advise any high-miles 1100 owner to watch that gear oil color and also get an oil sample analyzed every once in a while (because the bearing wear can take one of several forms and isn't always revealed by gear oil discoloration.) If caught early the repair isn't horribly expensive but if you let it go... well, Michael's pictures tell the story...

#448004 - 02/23/09 02:58 AM Re: Discolored Trans. lube [Re: smiller]  
Joined: Mar 2007
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Flyer5 Offline
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Montrose PA
I had to do mine at the 100k time frame as well . It wasn't a big deal a lot of other bikes wouldn't even make it that far . If they do usually they need a clutch and clutch basket as well . Dave


Current rides 2000R1100RT Black
Quicksilver MXL Sport 2 Light sport aircraft
#448087 - 02/23/09 05:59 AM Re: Discolored Trans. lube [Re: smiller]  
Joined: Feb 2009
Posts: 42
mexiglow Offline
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mexiglow  Offline
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saltillo coahuila mexico
i see you have damage bearing.. thats right...?
you all ready know how to fix it ... if you dont please mail me ...


felipe

k1200rs
r1100rs
gs 650

mexiglow@hotmail.com
#448133 - 02/23/09 11:30 AM Re: Discolored Trans. lube [Re: dave sawyer]  
Joined: Aug 2004
Posts: 275
Anton Largiader Offline
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Anton Largiader  Offline
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Posts: 275
Virginia
Dave,

SageRider's pictures show EXACTLY what was in that 'worst case' I was telling you about, where the guy was stuck and the tranny housing was trashed. When we opened the drain plug, at first nothing happened and then the oil very slowly came out looking like lava. "Niid so guet" in dialect.


Anton Largiader, Charlottesville VA
www.largiader.com
#448197 - 02/23/09 02:51 PM Re: Discolored Trans. lube [Re: Anton Largiader]  
Joined: Jan 2002
Posts: 8,287
SageRider Offline
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SageRider  Offline
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Posts: 8,287
Minden, Nevada
Anton,
My failure stranded me on the side of US50, "The Loneliest Highway" East of Ely.
I had just come off a high speed run between Delta Utah and the mountians west of the Nevada state line. Smelled gear oil. Stopped twice within a couple of miles but unable to find leak or other problem. When I stopped a third time, the clutch lever no longer actuated the clutch. Friction had melted the bearing for the pushrod, which had snapped. Tow time....
The gear oil that came out of that tranny was some of the most evil stuff I have ever smelled... Probably the only reason it wasn't solid crud was that it was synthetic gear lube. No varnish on the cases at all.
Rear case, input shaft, and all other bearings and seals were replaced.
About 100 miles later, the seal at the rear of the input shaft failed. Unknown to this day if we somehow screwed up in the rebuild (if so, multiple sets of eyes missed it.) or it was a defective seal.

Last edited by SageRider; 02/23/09 02:58 PM.

Michael
2010 Unrally IX Sierra Adventures Co-Chair
KE6GYC 2M/440
'12 F800-GS Trophy: (dearly departed)
'06 R1200-RT, Piedmont RED! (dearly departed)
'99 R1100-RT (dearly departed)
Minden, Nevada
#448219 - 02/23/09 03:23 PM Re: Discolored Trans. lube [Re: SageRider]  
Joined: Mar 2004
Posts: 12,372
smiller Offline
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smiller  Offline
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Asheville, NC
Quote:
Smelled gear oil.

Now that's something you don't want to happen while riding a BMW... grin

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