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Gear oil 75w90 vs 75w140

Discussion in 'Boxers/TR/M' started by tamburini44, Oct 31, 2019.

  1. tamburini44

    tamburini44 Karting

    Jun 6, 2019
    111
    The shop that did the last major on my TR used 75w140 in the gearbox.
    Shifts were fine both cold and warm, but I'm wondering about the long term.

    Anyone have experience with this weight oil in their TR?
     
  2. turbo-joe

    turbo-joe F1 Veteran
    Silver Subscribed

    Apr 6, 2008
    5,745
    southwest germany
    Full Name:
    romano schwabel
    in my competiton I only use 75W140 LSD castrol, in my BB only 75W90 LSD
    the oil in my competiton is getting much warmer than in the BB when I go curvy roads because the diff has to work more with so much power. but for "normal power and driving" I would use this 75W90 also in a TR
     
  3. tamburini44

    tamburini44 Karting

    Jun 6, 2019
    111
    Alright, I was wondering how the thicker spec when warm would work vis a vis the TR's known issue with the diff.
     
  4. ago car nut

    ago car nut F1 Rookie
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    Aug 29, 2008
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    Madison Ohio
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    David A.
    The oil viscosity should contribute to the suspect welds on the diff.
     
  5. MOSS

    MOSS Formula 3
    Rossa Subscribed Owner

    Apr 28, 2004
    1,247
    This is a case where you use what the factory says for sure. Redline 75-90ns is the bomb.
     
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  6. vincenzo

    vincenzo F1 Rookie

    Nov 2, 2003
    2,687
    Hmmmm.... interesting choice of words.
     

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  7. godabitibi

    godabitibi F1 Veteran
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    Jan 11, 2012
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    La Sarre, Quebec, Ca
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    Claude Laforest
    Seriously the Redline NS is the one to put in.
     
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  8. MOSS

    MOSS Formula 3
    Rossa Subscribed Owner

    Apr 28, 2004
    1,247
    Doubtful
     
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  9. ago car nut

    ago car nut F1 Rookie
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    Aug 29, 2008
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    Madison Ohio
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    David A.
    I misspelled should! Meant to read SHOULDN'T.
     
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  10. ttforcefed

    ttforcefed F1 World Champ
    Rossa Subscribed

    Aug 22, 2002
    12,158
    isnt this the same discussion as the tranny oil debate?!?!
     
  11. radlu

    radlu Formula Junior

    Jun 6, 2005
    335
    I've used the 75w140 in the gearbox without any problems.
     

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