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Overfilling M47 (or any) manual transmission can cause seals to fail?

posted by  kittysgreyvolvo on  Sat Nov 23 13:28 CST 2013
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last visit: Sat Oct 18 15:23 CST 2014
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Folks,

Can overfilling the Volvo M47 and M47 II, or any RWD Volvo manual transmission you may overfill, may cause the seals to fail?

Sort of sundry, yet not really ... 10W30 motor oil in that M47 II? (Should get vvpete's attention here). I think it is mineral 10W30. Not sure.

I'll indicate why in a subsequent post if any replies to this thread starter. The whole matter has me, uh, well, hmmm, disgruntled.

Like Grumpy Cat meme disgruntled. In other words, NO.

Thank you. Happy Holidays, everyone, you, and all of yours, and your RWD Volvos.

cheers,

Grumpy Cat meme Advocate.
--
He has a LOL cat meme problem. May be time for Betty Ford's clinic.








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    Overfilling M47 (or any) manual transmission can cause seals to fail?

    posted by  james_a_sousa on  Sat Nov 30 16:59 CST 2013
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    last visit: Thu Oct 23 18:51 CST 2014
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    How overfilled are you talking about?

    If the transmission were severely over filled so that all air was pushed out - expansion might create a condition called liquid filled and liquids do not compress - this would create a situation where the seals would be subjected to high pressure and fail for sure.








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      Overfilling M47 (or any) manual transmission can cause seals to fail?

      posted by  pageda on  Sat Nov 30 17:11 CST 2013
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      last visit: Fri Oct 24 13:18 CST 2014
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      Overfilled to something less than 2 litres, the reason is to keep oil in the top bearing of early M47's. I have never had a problem with leaking since I did it maybe 8 years ago.
      To overfill you raise the left side of the car as high as you can get it on jack stands and fill the trans until the oil comes out of the fill hole. This probably only gets and extra 4 to 6 ounces of fluid in the trans but enough to keep the upper bearing in oil.

      Dan








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    Overfilling M47 (or any) manual transmission can cause seals to fail?

    posted by  pageda on  Sat Nov 23 14:14 CST 2013
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    last visit: Fri Oct 24 13:18 CST 2014
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    I overfilled mine about 8 years ago and have had no leaks or issues?
    Dan








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      Overfilling M47 (or any) manual transmission can cause seals to fail?

      posted by  starsandbars on  Sat Nov 23 19:20 CST 2013
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      last visit: Thu Apr 24 20:55 CST 2014
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      What kind of oil did you use?








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        Overfilling M47 (or any) manual transmission can cause seals to fail?

        posted by  pageda on  Sun Nov 24 07:06 CST 2013
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        last visit: Fri Oct 24 13:18 CST 2014
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        I used Redline MTL, probably should have used OEM Volvo.
        Dan








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          Overfilling M47 (or any) manual transmission can cause seals to fail?

          posted by  someone claiming to be kittysgreyvolvo on  Tue Nov 26 14:35 CST 2013 [RELATED]

          This is a Volvo mechanic for some 35 years at a premier city center import auto repair facility.

          Unsure if synthetic or mineral 10W30.

          Yeah, and I have 3 litres of of the Redline as specified for the M47 II. Yet they did not use it, claiming the transmission was old.

          The transmission in this 1991 240 sedan has about 153k miles and never a problem.

          cheers,

          LOL Kitty Meme
          --
          meme








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          Overfilling M47 (or any) manual transmission can cause seals to fail?

          posted by  someone claiming to be kittysgreyvolvo on  Tue Nov 26 14:35 CST 2013 [RELATED]

          This is a Volvo mechanic for some 35 years at a premier city center import auto repair facility.

          Unsure if synthetic or mineral 10W30.

          Yeah, and I have 3 litres of of the Redline as specified for the M47 II. Yet they did not use it, claiming the transmission was old.

          The transmission in this 1991 240 sedan has about 153k miles and never a problem.

          cheers,

          LOL Kitty Meme
          --
          meme








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            Overfilling M47 (or any) manual transmission can cause seals to fail?

            posted by  pageda on  Sat Nov 30 17:14 CST 2013
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            last visit: Fri Oct 24 13:18 CST 2014
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            Well I have learned on the BB that it is synthetic from the factory and likely much better than the MTL I replaced it with. If I do it again I will get the recommended Volvo brand.
            Dan






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