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Old 04-08-2012, 07:55 PM   #1
DrWez OP
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2010 GS Adventure Transmission and Final Drive Oil

This question has probably already been posted but I can never find anything with the search function. So can anyone give me some guidance on the proper oil viscosity to use in the transmission and final drive on my 2010 GS Adventure. The manual doesn't have the info and the dealer has given me several answers. I put Amsoil 80W-90 in both today because I thought the dealer said that was ok.
Thanks
Wes
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Old 04-08-2012, 08:34 PM   #2
sanjaya_sugiarto
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Gear oil 75w-90 GL5 full-synthetics
Most important: GL5 grade oil

Recommended by BMW: Castrol SAF-XO

I myself use Castrol MTX or Motul Gear Competition (both are 75w-140)
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Old 04-09-2012, 03:48 AM   #3
ATCguy
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Ummm... ok, even though i've turned my share if wrenches over the years, I realize that I'm still a newbie when it comes to the BMW world and these boxer engines... so I guess I need to be educated.

I'm familiar with the need to occasionally change/refill the final drive oil... but what the hell is transmission oil? What's its purpose, where's the level indicator, and how does one drain and/or refill it?
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Old 04-09-2012, 04:00 AM   #4
sanjaya_sugiarto
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On boxer BMW (R series), the transmission and the engine are separated.

Regarding How-Tos:
- Transmission: http://www.jimvonbaden.com/R1200_24K.html
- FD: http://www.jimvonbaden.com/R1200_Final_Drive.html
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Old 04-09-2012, 05:12 AM   #5
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Interesting... Thanks.
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Old 04-09-2012, 05:45 AM   #6
jdub
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Quote:
Originally Posted by DrWez View Post
This question has probably already been posted but I can never find anything with the search function. So can anyone give me some guidance on the proper oil viscosity to use in the transmission and final drive on my 2010 GS Adventure.
Lots of good info on the GSpot FAQ Sticky (top of the forum page) also: http://advrider.com/forums/showpost....10&postcount=5
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Old 04-09-2012, 06:24 AM   #7
klondike1
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I use 80w-90 in both. Make sure like said before with the GL 5 rating. Transmission/gearbox oil. Make a funnel with hose on it and fill it thru the side and fill till it starts to come out hole you are filling. Can take a long time to fill if oil is cold. id of hose i had on funnel was about1/4 inch
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Old 04-09-2012, 03:53 PM   #8
DrWez OP
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What is a GL 5 rating? Would Amsoil Gear Lube 80W-90 or Amsoil Severe Gear 75W-90 qualify?
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Old 04-09-2012, 04:48 PM   #9
BMWRich
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Set-It and Forget-It

......................
Changed annually or @12-15K miles or (when changing tires).....trans and rear end both same oil....

Not a single leak,everyrthing nice an "tight" all in the last 55,000 miles....
Trans fluid looks almost brand new when dumped,rear end slightly darker....

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Old 04-09-2012, 04:51 PM   #10
Gruesome
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Quote:
Originally Posted by klondike1 View Post
Make a funnel with hose on it and fill it thru the side and fill till it starts to come out hole you are filling. Can take a long time to fill if oil is cold. id of hose I had on funnel was about1/4 inch
You can fold a funnel from aluminum foil. As I mentioned in another gear oil thread, 'my' dealer still has the previously spec'ed BMW-branded $15/qt oil on the shelves, and that didn't suddenly become unusable just because BMW updated the spec to the $45/qt Castrol. So, to me the easiest seems to be to just go with the BMW branded stuff (which btw does not have the trademark stubbly guy on the label - I was wrong about that.)
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