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Thread: What Tranny Oil do you use for G50-20 6 speed

  1. #1
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    What Tranny Oil do you use for G50-20 6 speed

    Some older post say Use any GL-5, some say use Swepco 201 or 210, some say GL-4 Driven Race is good, so not sure what is best for this tranny.

    Just curious as what other have used.

    Thanks,
    Mostafa

  2. #2
    Senior Member Roger Reid's Avatar
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    Just an old man with a great hobby

  3. #3
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    Thanks Roger, In one of the post from sometimes ago Eric d. said do not use Synthetic oil in G50, any truth in that?

  4. #4
    VRaptor SpeedWorks, LLC's Avatar
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    We've been using Redline 75W90ns in most of the Porsche transaxles here.
    Shane Vacek
    VRaptor SpeedWorks, LLC
    www.vraptorspeedworks.com
    Turn-key GTM, SL-C & Ultima GTR Built to Your Specs!
    Offering a full line of GTM Upgrades and Custom Parts

  5. #5
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    Shane,

    I check on redline these is this note, any truth in that, so confusing.

    75W90 GL-5 GEAR OIL
    This product is not designed for use in most manual transmissions or transaxles in passenger vehicles, since the extreme slipperiness may cause synchronizer mesh issues that lead to shifting problems.

    Going to call GBOX if they are still around and see what they say since they build my tranny almost 10 years ago.

    Thanks,
    Mostafa

    Thanks,
    Mostafa

  6. #6
    VRaptor SpeedWorks, LLC's Avatar
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    Quote Originally Posted by KGTM View Post
    Shane,

    I check on redline these is this note, any truth in that, so confusing.

    75W90 GL-5 GEAR OIL
    This product is not designed for use in most manual transmissions or transaxles in passenger vehicles, since the extreme slipperiness may cause synchronizer mesh issues that lead to shifting problems.

    Going to call GBOX if they are still around and see what they say since they build my tranny almost 10 years ago.

    Thanks,
    Mostafa

    Thanks,
    Mostafa
    I believe that is where the "ns" comes in on the redline product. The NS version has additives that make it work well with the syncros.
    Shane Vacek
    VRaptor SpeedWorks, LLC
    www.vraptorspeedworks.com
    Turn-key GTM, SL-C & Ultima GTR Built to Your Specs!
    Offering a full line of GTM Upgrades and Custom Parts

  7. #7
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    Thanks, did not notice th NS.

    I did talk to GBOX this afternoon he said if you can effort buy Mobil 1 Mobilube PTX 75W-90, only one place in us carries it about $35 a quart. thinking about it

    Mostafa

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