TH350 pump assembly hisses when

Discussion in 'Transmission & Driveline Topics' started by, Jul 26, 2005.

  1. Veteran Member

    May 31, 2004
    I apply compressed air to the intermediate clutch piston inlet port.

    I've sprayed solvent over the lip seals of the piston and no air bubles formed. But some kind of hissing sound is heard and the piston is not holding and immediately seating back when I stop applying compressed air.

    Any suggestions ? I don't think that is normal.

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