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Thread: T56 Transmission Fluid

  1. #1
    Senior Member Grass-Passer rleng1's Avatar
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    Cool T56 Transmission Fluid

    What are yall using for transmission fluid. Yes, Im changing the transmission fluid for nationals.
    Randy English
    NASA Texas --> Rocky Mtn Region
    CMC #77 Camaro

  2. #2
    Senior Member Carroll Shelby Fbody383's Avatar
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    Probably wrong guy to ask but I use Royal Purple.
    #39 CMC Camaro
    Orange is Fast!
    CMC-NT01 FTW!

  3. #3
    I’ve been using synthetic power steering fluid since 2001
    Well, not the same fluid but you know what I mean.
    Al Fernandez
    CMC National Director

  4. #4
    Senior Member Carroll Shelby
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    I've been running plain non synthetic pennzoil synchromesh. It's a touch notchy when cold but shifts like butter after the first warmup lap.

    The tremec guy here in TX said for what we do the shear resistance and protection of synchromesh is better than just running dexron iii, and to run the pennzoil (also valvoline, which is just pennzoil in their bottle) synchromesh.

    For a street t56 I would run regular dex III to avoid the notchines/wear from cold shifting.

    Then again I also ran synthetic redline D4 for four seasons and when we took it apart to do the LS conversion everything still looked great, so I have no idea lol.

  5. #5
    Quote Originally Posted by Pranav View Post
    I've been running plain non synthetic pennzoil synchromesh. It's a touch notchy when cold but shifts like butter after the first warmup lap.

    The tremec guy here in TX said for what we do the shear resistance and protection of synchromesh is better than just running dexron iii, and to run the pennzoil (also valvoline, which is just pennzoil in their bottle) synchromesh.

    For a street t56 I would run regular dex III to avoid the notchines/wear from cold shifting.

    Then again I also ran synthetic redline D4 for four seasons and when we took it apart to do the LS conversion everything still looked great, so I have no idea lol.
    Pennzoil...eww
    Daniel Records
    CMC # 34

  6. #6
    Senior Member Rookie
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    My track car has had redline d4 in it almost since new, 15 years. Fluid changed every year.

  7. #7
    I thought synchromesh fluids would be bad for transmissions that don't have brass synchronizers?
    CMC #50

  8. #8
    Senior Member Carroll Shelby
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    Quote Originally Posted by drecords View Post
    Pennzoil...eww
    C'mon mister oil expert. Pennzoil is the label they stick on Shell lubricants (same guys that make the rotella) sold in the US these days. The exact same stuff gets a shell sticker overseas.

    Pennzoil is nothing but a label brand these days.

  9. #9
    Senior Member Carroll Shelby ShadowBolt's Avatar
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    I was told the Pennzoil was the same as GM synchromesh. Joe Dietrich told me to run this in my 600RR.

    JJ

  10. #10
    Quote Originally Posted by Pranav View Post
    C'mon mister oil expert. Pennzoil is the label they stick on Shell lubricants (same guys that make the rotella) sold in the US these days. The exact same stuff gets a shell sticker overseas.

    Pennzoil is nothing but a label brand these days.
    I highly recommend Mobil products. Could be biased...
    Daniel Records
    CMC # 34

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