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  1. #1
    Member
    Join Date
    Jul 2004
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    Charlton, New York
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    93
    Corvette(s)
    2001 Pewter coupe

    Default MN6 transmission lubricant change

    I am considering changing the transmission fluid in my 2001 six speed. Does anyone know where I can find what the proper lubricant is (is Mobil One OK??).
    Also, what is the proceedure?

    Thank You,
    Dave

  2. #2
    Member Tombone's Avatar
    Join Date
    Jul 2004
    Location
    Ontario Canada
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    39

    Default

    I use Redline

  3. #3
    Member mqqn's Avatar
    Join Date
    Apr 2004
    Location
    In The Cornfield
    Posts
    500
    Corvette(s)
    02 EB Z06 / 99 BLK Coupe

    Default

    Hi Dave -

    There have been those who voice concern over using some of the synthetics in the MN6, the concern being that some lubricants can cause premature wear of the organic synchronizer friction materials.

    I have read that Royal Purple is ok to use, and I would not be afraid to use redline either, just make sure it is for manual transmissions.

    Myself, I will stick to the Dexron - III factory fill lube. It's cheap and I can change it as often as I fell necessary. 4.1 quarts are specificed as the fill quantity in the GM service manual.

    To drain/refill:

    There is a drain plug (with the word DRAIN cast in relief on the "passenger" side of the trans) just forward of the halfshaft, near the bottom. Remove it and allow the fluid to drain.

    Replace the drain plug.

    On the other side of the trans is a plug with the word FILL cast in relief on the trans case just above it - remove that plug.

    Pump 4.1 quarts of Dexron - III into the trans (I use a small fluid pump I bought at AutoZone just for this purpose for about $10).

    Replace the fill plug.

    Put two ice cubes in a small glass, fill with 1.5 oz of Jack Daniels.

    Toast to your success.

    best regards -

    mqqn


    02 EB Z06 - 388.9/377.5 11.91 @ 117 mph
    99 C5 Coupe - No numbers yet.
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  4. #4
    Member
    Join Date
    Jul 2004
    Location
    Charlton, New York
    Posts
    93
    Corvette(s)
    2001 Pewter coupe

    Default

    Thanks mqqn for the info! It seems to be something even I can do!

    Dave

  5. #5
    Member The Drakester's Avatar
    Join Date
    Sep 2004
    Location
    North Carolina
    Posts
    197
    Corvette(s)
    2006 MSM Z51 Vert Modded all to hell

    Default Trans fluid

    - I use Royal Purple - Diff also!

  6. #6
    Member sigshooter's Avatar
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    Oct 2002
    Location
    pensacola, fl
    Posts
    247
    Corvette(s)
    C4-Sold, C5-Sold. Looking for a C6.

    Default

    how often should this be done?

    thanks,

    tom
    tom
    98 black mn6. blackwing, corsa tourings w/tigershark tips, hurst shifter w/mgw knob, cags defeat, chrome z06 wheels in z06 sizes.

  7. #7
    New Member
    Join Date
    May 2005
    Location
    Seattle
    Posts
    1
    Corvette(s)
    1998 Lt Pewter Coupe

    Default

    I just changed my mn6 fluid out a few days ago with Redline D4 ATF which is synthetic but Dexron III compatible. My new to me '98 only had 20K miles with a pamperd life and the original factory fill trans fluid. I really didn't think it needed changing but I did it anyway because of the age. While draining it, I was surprised that the old fluid was a bit darkend coming out like it was slightly oxidized. These transmissions must be harder on the fluid than I realized. But what really surprised me is how much better the transmission feels with the Redline D4. Shifting gears is smoother and takes less effort than before. I'm curious if just changing to new Dexron III would have also improved the shift feel or is it from the Redline? I can only imagine it is a viscosity thing that make the difference in shift feel but perhaps there is more science to it than I realize.

    Oh BTW, draining hot transmission fluid can be a messy ordeal. It is thin like water and can splash out of the drain bucket so beware.

    -Ed

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