Volvo RWD 140-160 Forum

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Manual transmission fluid question 140-160 1969

posted by  someone claiming to be Jack on  Sat Apr 27 10:41 CST 2002 [RELATED]

I have a '69 144 with a M40 transmission, and the oil needs to be changed. Does anyone know if using synthetic oil in a transmission gives any significant benefit?








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    Manual transmission fluid question 140-160 1969

    posted by  68/142S on  Sun Apr 28 11:18 CST 2002
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    I just put RedLine MTL in my M40 and the difference is night and day.
    Not only does it shift way better,its not nearly as whiny.







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      Manual transmission fluid question 140-160 1969

      posted by  someone claiming to be Ira Eisenberg on  Sun Apr 28 14:44 CST 2002 [RELATED]

      I changed over to Redline MTL in my 164 with M 410 about a year ago. Shifting is unchanged from summer to winter and generally smoother than regular 30 weight oil.








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        Manual transmission fluid question 140-160 1969

        posted by  someone claiming to be iadr on  Fri May 3 13:55 CST 2002 [RELATED]

        What you *don't* want to do is use synthetic gear oil- it's too slippery for the syncros to work.
        B&M and Redline make manual transmission fluid that is great








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    Manual transmission fluid question 140-160 1969

    posted by  walrus3 on  Sat Apr 27 11:37 CST 2002
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    last visit: Mon Dec 2 14:20 CST 2013
    [RELATED]

    I doubt if it helps much at this late date.
    I don't think it really matters much. You might extend its life
    some but considering it is already 33 years old I think that it
    would have been a lot better to start it out on the stuff in 69,
    before it was even made!
    (No, doesn't make any sense to me, either.)
    --
    George Downs Bartlesville, Oklahoma







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