5 thoughts on “Automatic Transmission (1st generation)

  1. Coming in a little late I guess, but having done this numerous times, here are my thoughts/experiences.
    1) The original seal in the tranny is made by “National” you can still get this original seal, and having pulled the engine twice due to leaking with the rubber coated seal (replacement from VW) I won’t use anything but the National OE one.
    2) The dirt that accumulates around the seal surface where it touches the torque convertor is a big issue and usually causes a wear ridge in the sealing surface on the convertor…add the end play movement, and the seal moving across the groove, and you have the reason for future leaking.
    3) There used to be a repair kit for the mating surface on the convertor…if in doubt, get it to someone who rebuilds them and have it checked…I usually just buy a rebuilt one the first time it’s out if there is a groove you can feel with your finger nail…it’s cheaper than pulling the engine again and losing use of your bus.
    So there you go….I suggest you look at the following to make sure your tranny is keeping healthy…

    1) the final drive contains hypoid…it should be changed with the pan seal every few years and more often in hot dusty climates….if it doesn’t leak hypoid, a change to synthetic helps it live longer…it also has side cover seals behind the flanges where the axles bolt up…if they have not been replaced, doing them while the tranny is out is much easier…
    2) the ATF section has a pan gasket, and a paper seal under a screen they protect the pump, and should be serviced every couple of years to keep fluids healthy.

    If you have any other questions feel free to ask…Den.

    1. Thanks for the feedback Den. Good notes to have around. I replaced the pan seal along with the torque converter seal, so we’ll see how that goes. The transmission and engine are back in, so I should be reporting back shortly :)

  2. Crap, still leaks as bad as before. Having little time to put it back together, I’m wondering if the torque converter seal was not either properly seated or possibly damaged with putting the torque converter in. Once we settle in at the new diggs, I’ll be able to take the engine out and look at things better. *sigh*

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