Gear Oil

Discussion in 'Troubleshooting & Diagnosis' started by GPN, Jul 16, 2020.

  1. GPN

    GPN Veteran Member

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    Best/Recommended for Manual Borg Warner T10?
     
  2. Gary S

    Gary S Administrator Lifetime Gold Member

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    The book calls for 80W-90 gearlube. If you are using synthetic lube, 75W-90 is the same thing with better low temperature performance.
     
  3. GPN

    GPN Veteran Member

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    Thank you
     
  4. Gary S

    Gary S Administrator Lifetime Gold Member

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    Also, you want GL4 rated fluid, not GL5 rated fluid. GL5 is for rear differentials and can have additives that corrode brass.
     
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  5. GPN

    GPN Veteran Member

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    Tnx
     
  6. COPO

    COPO Veteran Member Lifetime Gold Member

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    GL5 tranny fluid did not corrode my Muncie synchros when I used to use it for many years.
    I also used it in the BW trans in the 77-81 Z28’s.
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    8B27464F-FC99-4532-8C32-D4AFCD8E5911.jpeg
     
  7. Lowend

    Lowend Administrator. .a car, a man, a maraca. Staff Member Lifetime Gold Member

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  8. GPN

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  9. Gary S

    Gary S Administrator Lifetime Gold Member

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    Amsoil has a lube very similar to the Redline product. Amsoil MTG is specially designed for older manual trannys and is GL4 rated.
     

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