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Jeep: RedLine MT-90 oil for manual transmission?

  1. #1
    Robert
    Guest

    RedLine MT-90 oil for manual transmission?

    Ok ... I just found out some bad news, and I wanted some good advice.

    I've got a '91 XJ, with an AX-15 manual tranny. It has brass synchro rings.
    The owner's manual calls for GL-5 gear oil.

    I just read that was a mistake ... they ran that info for about 2 years,
    then changed it to GL-3 oil.

    Turns out, the sulfur and sulfite additives in the GL-5 grade oil eat up the
    brass synchros.

    Anybody else heard that?

    What about redline MT-90? is that good? Will it do any damage? Thanks in
    advance ... any info would be appreciated ... even if it's not directly
    related ... :-)



  2. #2
    Jerry
    Guest

    Re: RedLine MT-90 oil for manual transmission?

    Redline MT-90 is ideal for the AX-5 and AX-15 transmission, I'm using it
    in my own AX-15. You're right that GL-5 is not good for the synchros,
    the sulphur-based additives contained in most GL-5 lubes are harsh on
    soft yellow metals like brass.

    Robert Dyke wrote: 

    --
    Jerry Bransford
    PP-ASEL N6TAY
    See the Geezer Jeep at
    http://members.cox.net/jerrypb/

  3. #3
    Jerry
    Guest

    Re: RedLine MT-90 oil for manual transmission?

    P.S. Bill's webpage is outdated as it is still showing that GL-5 is
    recommended for the AX-5/15. Chrysler rescinded that GL-5
    recommendation probably 5-6 years ago, changing it as you said to GL-3
    which does not contain the harmful additives present in GL-5.

    Jerry Bransford wrote: 

    --
    Jerry Bransford
    PP-ASEL N6TAY
    See the Geezer Jeep at
    http://members.cox.net/jerrypb/

  4. #4
    Robert
    Guest

    Re: RedLine MT-90 oil for manual transmission?

    Hi Bill:

    Thanks for posting that info ... but it's outdated. Chrysler recommended
    GL-3 in their earlier jeeps, then switched to GL-5 when that new spec came
    out. Afterwards, they learned that the sulfur and sulfite additives in GL-5
    lubes are highly corrosive to brass synchro rings, which are found in the AX
    5/15 trannies.

    Chrysler rescinded the GL-5 recommendation about 8 years ago, and has
    switched back to GL-3. Check with your dealer service dept ... they will
    verify it.

    Does anybody know if Redline MT-90 (synthetic, GL-4) has sulfur or sulfite
    additives?

    Thanks!!



    "L.W. (ßill) Hughes III" <net> wrote in message
    news:net... 
    rings. 
    the 
    in 



  5. #5
    Jerry
    Guest

    Re: RedLine MT-90 oil for manual transmission?

    Neither Redline's MTL nor MT-90 contain any of the harsh sulphur-based
    additives, both are great for the AX-5. MTL for really cold areas,
    MT-90 for the rest of us.

    Jerry

    Robert Dyke wrote: 

    --
    Jerry Bransford
    PP-ASEL N6TAY
    See the Geezer Jeep at
    http://members.cox.net/jerrypb/

  6. #6
    Robert
    Guest

    Re: RedLine MT-90 oil for manual transmission?

    Good ... I just order 4 qts of the MT-90 from summit racing :-)



    "Jerry Bransford" <net> wrote in message
    news:IHzrf.17279$.. 
    recommended 
    came 
    GL-5 
    the AX 
    will 
    sulfite 
    years, 
    up 
    Thanks 




 

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