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Powershift Transmission Rear Spline Play

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  • Powershift Transmission Rear Spline Play

    I have a substantial pool of transmission fluid on my garage floor. The drip is constant and appear to be coming from the rear transmission seal. I've pulled the drive shaft and found the rear spline has a great deal of play with the drive shaft removed.

    How much play would be normal?

    Allen

    1964 GT Hawk soon to be R2 Clone
    1964 GT Hawk
    PSMCDR 2014
    Best time: 14.473 sec. 96.57 MPH quarter mile
    PSMCDR 2013
    Best time: 14.654 sec. 94.53 MPH quarter

    Victoria, Canada

  • #2
    Sounds like you need two items, a rear bushing and a rear seal. The bushing will take care of the 'wobble', the seal will keep the oil in. A new seal will work until it gets worn from the wobble. Maybe instead of a bushing you need a rear spline piece. it shouldn't wobble on the splines.

    Before you do anything, wait for someone to correct me.

    [img=left]http://www.alink.com/personal/tbredehoft/Bothcars.jpg[/img=left]
    Tom Bredehoft
    '53 Commander Coupe
    '60 Lark VI
    '05 Legacy Ltd Wagon
    All three Indiana built OD cars

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    • #3
      If I'm understanding things correctly, a little wobble with the slip yoke removed is not necessarily bad, but if the slip yoke itself wobbles, you may need a new rear bushing. Also carefully inspect the slip yoke, if there's a noticeable groove or pitting in it that may take out your new seal.

      nate

      --
      55 Commander Starlight
      http://members.cox.net/njnagel
      --
      55 Commander Starlight
      http://members.cox.net/njnagel

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      • #4
        With the drive shaft installed there is no play in the rear yoke; therefore I do not think the rear bushing needs servicing. The rear seal is a definite for replacement. The drive shaft slip yoke is not pitted and appears in fine shape, not perfect but relatively good shape . It was my impression from the previous owner the transmission was rebuilt some 10,000 miles ago.

        My concern was with the drive shaft slip yoke removed how much play would be normal on the spline that stick out of the transmission?



        1964 GT Hawk soon to be R2 Clone
        1964 GT Hawk
        PSMCDR 2014
        Best time: 14.473 sec. 96.57 MPH quarter mile
        PSMCDR 2013
        Best time: 14.654 sec. 94.53 MPH quarter

        Victoria, Canada

        Comment


        • #5
          Alan,

          What Nate says, and, shiney up the yoke with some fine corocus cloth, put a new seal in, lube up the yoke before install, you should be good to go. The tail shaft without the yoke is ok to be loose...needs to be snug with the yoke installed. Hope this helps.

          Dan Miller
          Atlanta, GA

          [img=left]http://static.flickr.com/57/228744729_7aff5f0118_m.jpg[/img=left]
          Road Racers turn left AND right.

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          • #6
            Thanks, I clean up the drive shaft slip yoke and install the new seal.

            Allen

            1964 GT Hawk soon to be R2 Clone
            1964 GT Hawk
            PSMCDR 2014
            Best time: 14.473 sec. 96.57 MPH quarter mile
            PSMCDR 2013
            Best time: 14.654 sec. 94.53 MPH quarter

            Victoria, Canada

            Comment

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