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V7II transmission / gear oil swap?

Discussion in 'V7/V85/V9 Chat & Tech' started by Spumoni, Apr 24, 2018.

  1. Spumoni

    Spumoni Tuned and Synch'ed

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    I am doing my first of the year fluid change, and I keep getting confused on all of the gearbox/tranny terminology. I've got about 6500 miles on the bike now, and I've already changed the fluids once at the 600 mile service. My fear is that I swapped the gearbox/tranny fluids (based on how much fluid is left in the container) Hopefully this didn't cause any damage. I will change both fluids now, then probably change them again in 100 miles just to be sure it's all out.

    Just to clarify, is this correct?

    Gearbox (6 speed) oil, 75W-90, 500 cc specified,

    Trans (rear hub) oil, 85w-140, 170 cc specified.
     
    Last edited: Apr 24, 2018
  2. Godfrey

    Godfrey High Miler GT Famiglia

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    Yes: The gearbox is what we Americans call the "transmission" and the transmission is what I at least usually refer to as the "final drive unit" (and you refer to as the "rear hub").

    You've got the oil weights and capacities correct; API GL-4 or GL-5 for the rear hub, API GL-5 for the gearbox to specify the oil type.
     
  3. Spumoni

    Spumoni Tuned and Synch'ed

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    Great - thanks for the clarification. I fear that I rode 6000 miles with the oils switched. Surprisingly everything seems fine.

    Should I use the Guard Dog additive to both fluids?
     
  4. Godfrey

    Godfrey High Miler GT Famiglia

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    I suspect that if you ran the gearbox so underfilled and the rear drive so overfilled (a capacity swap) you'd have seen/heard some evidence. If you simply ran the heavier oil in the gearbox and the lighter oil in the rear drive, the likelihood is that it wasn't stressed so far out of bounds as to cause any damage. They're not that different, particularly when the weather has been cool. As always, examine the magnetic drain plugs for excess shards and look at the oil as it comes out to see if there are signs of distress.

    ---
    I don't use additiives.

    I figure that the oil manufacturers do a darn fine job of formulating these lubricants, much better than some smaller company can figure with the same consistent results for all kinds of different possible oils and lubrication situations. Very rarely, a particular additive has benefits in some cases, but I've more often found the reverse to be true. And, in general, the vehicle developers also do a good job of testing their engines and other power train components with the specified lubricants to promote low wear and long life—they have the most to lose in this regard.

    Why spend money on stuff that might or might not do anything good for your bike? :)
     
    Trout likes this.
  5. Spumoni

    Spumoni Tuned and Synch'ed

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    Good point - fortunately I had the capacities right, only the fluids were swapped. The magnetic plug looked fine on the rear hub. I will check the gearbox shortly, and make sure the right fluids go in the right place this time. I will skip the Guard Dog additive.

    Thanks for the feedback!
     
  6. vagrant

    vagrant High Miler GT Contributor

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    Once again what year v7? Some hold a full liter newest half that
     
  7. Spumoni

    Spumoni Tuned and Synch'ed

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    I have a 2016, The rear hub takes about 5.75 ounces, and the gearbox takes about 17 ounces. I ended up replacing both with the proper oil this time - then I rode it for about 30 miles and changed them both again. Thankfully everything seems totally fine.
     
  8. Godfrey

    Godfrey High Miler GT Famiglia

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    2016 V7II models have exactly the same capacities as 2017 V7III models in gearbox and rear drive, and use the same lubricants.
     
  9. jefrs

    jefrs Just got it firing!

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    The V7 II ABS dates from 2015 and takes 500ml in the gearbox. The six speed box. The model continued on into 2017.

    The italian does use the word "transmision" (Aceite de la transmision)for the drive shaft and hub, sometimes we have to go back to the original language to figure out what they're on about.
     
  10. vagrant

    vagrant High Miler GT Contributor

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    the US didn't get the V7II 6 speed until 2016.
     

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