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  1. #1
    Established Member Two Rings
    Join Date
    May 06 2009
    AZ Member #
    42148
    My Garage
    2004 Audi S4 Sedan (automatic)
    Location
    Virginia

    Using stronger magnets in transmission pan?

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    My 2004 Audi S4 Sedan automatic just passed 100k miles (previous owner didn't drive it much), and the transmission fluid has never been changed (because the manual did not recommend doing so). But you all have convinced me the manual lies, so ...

    Anyway, I am going to take off the transmission pan, and replace the filter and fluid. While I had the pan off, I was considering changing the magnets inside the pan, or adding new magnets.

    On the idea "more is better", I was thinking about getting some rare earth magnets and epoxying them inside the pan.

    The magnets I am looking at can pull 10 pounds a piece, and are very small. Clearance is not an issue.

    I was concerned that there might be electronics inside transmission, and since magnets can induce electrical current, I was concerned that adding a bunch of additional magnetic power would screw up the electronics inside the transmission.

    Any thoughts?
    Last edited by Black Leaf; 04-01-2014 at 04:28 AM.

  2. #2
    Veteran Member Four Rings SpoolBus's Avatar
    Join Date
    Aug 07 2013
    AZ Member #
    120510
    Location
    ATL/GA

    There are 3 magnets in the pan now (2- square, 1-doughnut) and they are all caked in sludge, not capable of picking up much (if any) metal particulate at 100K miles
    Its a great idea when the transmission is new, fresh fluid/filter and metal is coming off as the internals of the unit "break in" but not so much as they get coated in the sludge and your break in is complete.
    At 100K whats coming off your transmission is the friction plate material which the filter gets and eventually builds up on the pan again. Mine no visible metal particles of metal at 85K miles (1st change).
    The OEM magnets are sufficient, also you don't want any epoxy submersed in transmission fluid securing anything down that you don't want to potentially come off and tumble through the transmission

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