rear end sealant

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  • Dick G.
    Very Frequent User
    • June 1, 1988
    • 681

    #1

    rear end sealant

    I am taking my rear diff. to a local perf. shop to install my rebuild kit with clutch pack, I got from Vansteel. He wanted to use a gasket called Tough Cork, but it isn't made for this rear. He doesnt like paper gaskets, so he said the next best is a silicone sealant. Good or bad??
  • Michael W.
    Expired
    • April 1, 1997
    • 4290

    #2
    Re: rear end sealant

    I used the black silicone gasket stuff on mine 4 years ago, hasn't leaked a drop.

    Comment

    • Roger Legge

      #3
      Re: rear end sealant

      Permatex makes a product called The Right Stuff. It comes in a can like Cheese Whiz where you push a nozzle on the top sideways to get the product out of the container. It's a gasket replacement product and it is something else. Expensive, but you get what you pay for ...

      Roger
      #36316

      Comment

      • Dick W.
        Former NCRS Director Region IV
        • July 1, 1985
        • 10485

        #4
        Re: rear end sealant

        Silicone would be fine, but use one that is listed safe for O2 sensors. Some of the silicone sealers contain acetic acid (as in vinegar) as a curing agent. On vehicles that sit for extended periods of time, the vapors from the acetic acid can cause bearing to rust.

        Loctite manufactures a product called Gasket Eliminator. It is not a silicone and works very well with machined surfaces such as differentials
        Dick Whittington

        Comment

        • Dick W.
          Former NCRS Director Region IV
          • July 1, 1985
          • 10485

          #5
          Re: rear end sealant

          Probably the same product that I was talking about. Just a different label. Loctite owns Permatex. Prefer either to silicone
          Dick Whittington

          Comment

          • Tom Merkel

            #6
            Re: rear end sealant

            Gentlemen - In re-installing my '67 3:55 posi three years ago, I don't remember using any gasket or sealant when putting it together. Just used an air tool to clean each mating surface.

            Please don't tell me I've screwed-up in doing this, and didn't put a "gasket or sealant" between the cover and carrier.

            Tom

            Comment

            • Dick W.
              Former NCRS Director Region IV
              • July 1, 1985
              • 10485

              #7
              Re: rear end sealant

              If it ain't a leaking yer musta put something between the differential housing and the case. Metal to metal just does not hold oil
              Dick Whittington

              Comment

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