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Thread: 89 transmission

  1. #1
    Join Date
    Aug 2005

    89 transmission

    My 1989 Allante's transmission shifts ok into all gears but 3rd. The tac revs before it goes from 3rd to 4th. Has any one had this problem or knows what may be wrong?

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  3. #2
    Join Date
    Jun 2004
    West Palm Beach, FL.

    Re: 89 transmission

    Probably the clutch pack is worn, or else internal seals. The only thing I know of to try is to have the fluid and filter changed, and then add a container of Lucas transmission additive to see if that helps. But it's probably time for an overhaul.

  4. #3
    carnut is offline Cadillac Owners Master
    Automobile(s): 1999 BMW 740 Il. 2005 Jag XK8, 1988 Mercedes Benz 300 SE
    Join Date
    Feb 2003

    Re: 89 transmission

    Always verify trans fluid full with engine at normal temp before any further diagnosis is attempted. If full, change the fluid, filter as recommended above and pray!

  5. #4
    Join Date
    Jun 2005

    Re: 89 transmission

    A word of caution. My mechanic tells me that, if the transmission fluid hasn't been changed for a while, to drop the pan and do a filter change first. After a thousand miles or so, then do the complete fluid change. His experience is that doing a change can often cause the transmission to go out. I had never heard this before, but it sure explains some of the transmissions I have replaced in the past.


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