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Thread: Rear wheel oil

  1. #16
    Benchwrenching PGlaves's Avatar
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    Quote Originally Posted by 73043 View Post
    So how is life in Texas, PG? Too warm for me, I spent 3 years in Wichita Falls.
    Hans
    Too warm for us too. We are traveling on the bikes for the summer. We went to Hyder, AK and are now back in Iowa following the RA rally in Colorado. We will attend the MOA rally in Sedalia and head back to British Columbia after the rally.
    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
    http://www.bigbend.net/users/glaves

  2. #17
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    Sounds good!
    Drive safe
    Hans

  3. #18
    Administrator 20774's Avatar
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    Quote Originally Posted by 73043 View Post
    I spent 3 years in Wichita Falls.
    Makes me ask...why?? ENJJPT flight training with the USAF?? Seems that's about all there is in W.F.
    Kurt -- Forum Administrator ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  4. #19
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    That??s correct. EuroNatoJointJetPilotTraining. I was a student in 86/87, instructor in 95-97. Being an instructor there was my best 2 years in my 14 year RoyalNorwegian Air Force career. That??s how I ended up with my 95 R100RT. Bought it brand new in Ft.Worth Jan 96. BMW of Ft. Worth, 816 S. Sylvania. Do they still operate?
    I initially bought a 89 Inheritage Softtail. Looking over all the receipts, I figured total milage was 3 X what the seller claimed. Might have been an honest mistake. He was a retired tech from the base. So I got my 11 grand back without a fuss.
    Instead I got a brand new R100RT, with helmet, gloves, etc., for less, think it was 10.4.
    Hans

  5. #20
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    A bit OT

    Hans -

    We probably never crossed paths, but I had flight data recorders on the T-38s there in about 2000. I also had recorders on the RNoAF F-5A/B models in the early to mid 1990s. The aircraft were at Rygge, outside Oslo. A bit of a tragedy at one point...one of the recorder aircraft was performing an airshow and the pilot performed a loop with not enough altitude...the flight data showed him pulling the nose up, stalling, nose down, then up, stalling...ran out of altitude. I understand his family was in the crowd that day. A shame...

    I had a great time in Norway, sprinting across the country one day to see some fjords and then back to town. Loved the country!! I was tall, blonde, and could say Tusen Takk well...but probably was still seen as a foreigner!! Ha!

    Now back to your regular gear oil thread...
    Kurt -- Forum Administrator ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  6. #21
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    Back to topic. On the Norwegian forum, a guy suggest the cause is rust inside.
    The bike was not in use for 5 years, 05-10. So now, with frequent use, and service, that rust is coming off. Hopefully he is right.
    Hans

  7. #22
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    My '78 sat for 14 years in a shed; when the the transmission, drive, and differential (rear wheel) oils were drained there was water in all the oils. The water was from accumulated condensation. Not being one to fret over such acts of nature, I plan to ride the bike a few hundred miles before changing all the oils then change the oils again every 1K miles a few more times. Rust in the form of particles would concern me, discolored oil - not so much.
    Stan

    AH# 13238

  8. #23
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    I have driven 2500 km, about 4 K miles. The rear wheel oil is changed. I??m not sure if everything is normal.
    Hans
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  9. #24
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    What do you experts think?
    Hans
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  10. #25
    Bill Lumberg 175781's Avatar
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    I haven't changed the rear drive fluid in my R75/6 since I've owned it, and it's time. Can someone confirm whether it's 80/90 GL5 or one of the other weights mentioned for for the final drive, and how to gauge when it's full/at proper level? Since my 1150 is my daily driver, I have no excuse but to branch out a bit with the R75 and start doing basic maintenance myself.
    R75/6, 2004 R1150RTA.

  11. #26
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    Quote Originally Posted by 175781 View Post
    I haven't changed the rear drive fluid in my R75/6 since I've owned it, and it's time. Can someone confirm whether it's 80/90 GL5 or one of the other weights mentioned for for the final drive, and how to gauge when it's full/at proper level?
    80w90 GL5 is the right oil. Fill to the bottom of the threads at the filler cap. Maybe spin the rear wheel around a few times and see where the oil level settles too.
    Kurt -- Forum Administrator ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  12. #27
    Registered User ebeeby's Avatar
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    +1 on moving the wheel a bit to get the oil to settle.

  13. #28
    Smoooooth at 430 gch71's Avatar
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    Ok, now I'm confused...

    Sorry guys/gals but I was doing some research and came to the conclusion that after some years of running gear oil rated GL5 I was wrong . Some say that the chemicals associated with GL5 rated gear oils are corrosive to "yellow metals" brass etc. and that GL4 rated gear oil should only be used. The yellow metals are in our airheads the tranny and drive train.. So what gives? GL4or GL5
    And some say that the chemical additives are not really needed because our airheads are not equipped with nor operate at such pressures and temps, they are talking about the adhesion of a film to the gears for lubrication..simple terms fellas so I guess I can either open up my tranny and take a look or just switch back to GL4 rated gear oil.
    Any one else got any info on this?
    By the way, I found a new job and now drive everyday to work on my R60/6 aaaaaa life is good down here in the south....75 degrees today in Houston.
    Thank you for the prayers and kind words during those difficult times, but we ended up in a better position thank you all.
    Glenn
    ...driving to work on my airhead
    '74 R60/6, '75 R60/6(boxes)

  14. #29
    Benchwrenching PGlaves's Avatar
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    I don't know about /2 and earlier bikes, but 90 wt GL5 gear oil is what I have always found specified for 1969 and later /5 BMWs. 80w90 dino and 75 or 80w90 synthetic is OK too but not necessary.

    GL4 is not suitable in either the transmission or final drive as far as I can find specifications.
    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
    http://www.bigbend.net/users/glaves

  15. #30
    Monza Blue 1974 R90/6
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    Quote Originally Posted by Gch71 View Post
    Some say that the chemicals associated with GL5 rated gear oils are corrosive to "yellow metals" brass etc. and that GL4 rated gear oil should only be used. The yellow metals are in our airheads the tranny and drive train.. So what gives? GL4or GL5.
    One of the places I have seen this is on Craig Vechorik's site:

    http://www.benchmarkworks.com/

    Here is what it says under "Tech Advice" and then "Technical Articles and How To" and finally, "Warning About Gear Oil"

    "Sadly, Pennzoil no longer makes GEARPLUS?« SAE 80W-90 GL-4

    Never the less, the following still holds true:

    WARNING:
    All modern gear oil available today in local retail outlets is GL-5 grade. GL-5 grade gear oil contains sulphur compounds that attack brass and bronze. BMW transmissions and final drives made before 1992 contain bushings and thrust washers made of these metals. Any brand of gear oil that is GL-5 rated will attack bushings and thrust washers. Bench Mark Works LLC, I use only GL-4 gear oil and we have it available for sale to our customers at the online parts store.

    Look for:
    acc070A--$8.95--80W 90 GL-4 gear CRC brand

    CRC?« Sta-Lube?« Multi-Purpose HYPOID SAE 85W90 Gear Oil API/GL-4:

    CRC?« Sta-Lube?« Multi-Purpose HYPOID SAE 85W90 Gear Oil API/GL-4 is specially formulated to meet the unique requirements of API GL-4 service in manual transmissions and transaxles of passenger cars, light trucks and SUVÔÇÖs. CRC?« Sta-Lube?« Multi-Purpose HYPOID SAE 85W90 Gear Oil API/GL-4 is blended from select base stocks and additives that yield a lubricant of exacting quality. This product is compounded utilizing specialized extreme pressure chemistry that provides protection of gears and bearings without being corrosive to bronze components. It contains foam suppressants to prevent wear, which can be caused by lubricant foaming and aeration. Effective rust and corrosion inhibitors protect metal surfaces from the effects of water contamination from condensation and the operating environment. CRC?« Sta-Lube?« Multi-Purpose HYPOID SAE 85W90 Gear Oil API/GL-4 resists the formation of varnish deposits on synchronizer components, thus assuring long, trouble-free operation.

    CRC?« Sta-Lube?« Multi-Purpose HYPOID SAE 85W90 Gear Oil API/GL-4 gives the full protection of an SAE 90 under hard driving conditions while providing the flow characteristics of SAE 80W that are necessary during cold weather start-ups. This offers maximum lubrication and gear protection over a wide temperature range.

    CRC?« Sta-Lube?« Multi-Purpose HYPOID SAE 85W90 Gear Oil API/GL-4 is designed for manual transmissions and transaxles of both American and import vehicles. It is formulated to be compatible with ÔÇ£yellow metalsÔÇØ, such as bronze, found in synchronizers and other transmission componenets.

    BENEFITS:

    ÔÇó Meets the performance requirements of API GL-4 Service
    ÔÇó Will not cause glazing of synchronizer components
    ÔÇó Excellent thermal stability
    ÔÇó Outstanding extreme pressure and antiwear protection
    ÔÇó Prevents rust and corrosion
    ÔÇó Inhibits foaming and aeration


    Bench Mark Works LLC
    Craig Vechorik email vech@benchmarkworks.com
    3400 Earles Fork Road
    Sturgis, MS 39769 USA
    Telephone/FAX: (662) 465-6444
    Toll-free order line: 1-800-323-7102
    Hours of Operation
    Technical advice: (662) 465-6444
    All rights reserved."

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