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Thread: 1972 r75/5 rear drive

  1. #1
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    1972 r75/5 rear drive

    I have a /5 with a 32/10 rear drive with a well worn spline
    I have access to a 37/11 rear drive with very low miles
    What would be the down side of using the 37/11
    I am assuming the speedo would be off somewhat and the rpms would increase
    Any pros
    Thanks

  2. #2
    Liaison 20774's Avatar
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    Reduced gas mileage. Possible reduced top end speed. Quicker acceleration off the line.
    Kurt -- Forum Liaison ---> 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!

  3. #3
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    Get the 37/11. If it is in good shape.
    Use until you get the 32\10 refurbished. You can ride right thru repairs.
    Rear Ends are hard to buy if non are for sale at a time when you need one.

    You shouldn’t be that dissatisfied with the difference between a 3.2 (32/10) and the 3.36 (37/11).
    Lower First gear (all gears) and lower 5500rpm highway speed (among other differences already mentioned). Lower speeding tickets too.

    Charlie

  4. #4
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    Thanks all for the help
    Any suggestions for the spline work
    West coastish

  5. #5
    Liaison 20774's Avatar
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    Hansen's BMW in Oregon is the place most often brought up for repair work. Additional discussion about spline work locations was in this past thread:

    https://forums.bmwmoa.org/showthread...-spline-repair
    Kurt -- Forum Liaison ---> 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. #6
    Rally Rat 1074's Avatar
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    You never know exactly what you get when you buy a used item. Since you know what you have now, I'd send your unit out for a re-spline and reseal. Then it'll be like starting from scratch. Hansen's is known for their good work and you'll get yours back as good as new!
    Boxerbruce

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