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XJ650 Gear Oil Question

Discussion in 'XJ Technical Chat' started by tbalonick, Oct 20, 2014.

  1. tbalonick

    tbalonick New Member

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    Just a quick question I cant find a 100% answer on. I see the manual calls for either an 80 or 80/90 Hypoid GL-4 oil, locally all I can find is GL5 oil, is it safe to use this or should I just go online and order the GL4 stuff? Thanks.
     
    tbalonick, Oct 20, 2014
    #1
  2. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Stick with GL-4. I can't remember if there are any brass parts or zinc-plated parts in the final drive, but if there are GL-5 will eat them for lunch.
     
    k-moe, Oct 20, 2014
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    tbalonick likes this.
  3. tbalonick

    tbalonick New Member

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    Thats kinda what I was grasping from the difference between gl4 and 5. Thanks for the response, off to hunt for gl4.
     
    tbalonick, Oct 21, 2014
    #3
  4. TIMEtoRIDE

    TIMEtoRIDE Active Member

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    Rut-Roh !! . . .
     
    TIMEtoRIDE, Oct 22, 2014
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  5. Rooster53

    Rooster53 Well-Known Member Premium Member

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    From page 26 of the xj750RJ Owner's Manual:

    Recommended oil:
    SAE 80 API "GL-4" Hypoid gear oil
    If desired, an SAE 80W/90 hypoid gear oil
    may be used for all conditions.
    Note: --------------------------------------------
    "GL-4" is a quality and additive rating. "GL-
    5" or "GL-6" rated hypoid gear oils may also
    be used
    ---------------------------------------------------

    So, is this a misprint of sorts or can it be trusted?
     
    Rooster53, Oct 22, 2014
    #5
  6. tcorbitt060813

    tcorbitt060813 New Member

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    Would you use a full synthetic? I am looking at the oils I sell at my store and the only GL-4 I carry is an Amsoil product.
     
    tcorbitt060813, Oct 22, 2014
    #6
  7. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    This question "sort of" came up again. I looked in both my copies of the FSM and the Haynes and do not find the note about using GL-5 in either copy. This may be a case of a misprint in the owner's manual, or in the service manuals.

    Who has a spare final drive to tear into, and the time to do it?
     
    k-moe, Jun 18, 2015
    #7

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