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  1. #1

    Default PCM 40a slipping in forward

    I have a PCM 40A 1.23/1 transmission in my 96 sport nautique. It began slipping in forward but not in reverse. Changed the clutch plates and seals. It still is slipping. Once you have enough throttle it will go into gear until you slow down. Pressure problem? Any way of adjusting the oil pressure?

  2. #2
    Join Date
    Sep 2008
    Location
    Maryland - USA
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    6,803

    Default Re: PCM 40a slipping in forward

    sounds like not enough pressure coming out of the pump....did you go thru the pump while the gear was apart?

  3. #3

    Default Re: PCM 40a slipping in forward

    Quote Originally Posted by makomark View Post
    sounds like not enough pressure coming out of the pump....did you go thru the pump while the gear was apart?
    Looked at the pump gears but didn't see anything obviously wrong.

  4. #4
    Join Date
    Sep 2008
    Location
    Maryland - USA
    Posts
    6,803

    Default Re: PCM 40a slipping in forward

    I can't say I've read the PCM spec but 'looking at them' doesn't assess all aspects of wear.....besides the pump, the only remaining items would be the control valve (usually not an issues as long as the cable hasn't been altered) and the pressure regulating device....I think getting a hose and pressure gauge out would be a good start...

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