Another Caddy shift problem

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Cadillac Catera and Cimarron Forum Discussion, Another Caddy shift problem in Past Cadillac Vehicle Discussion; First problem was the shift position sensor, or neutral safety switch. Fixed the sluggish not wanting to go problem. Now ...
  1. #1
    bobbyc67 is offline Cadillac Owners Member
    Automobile(s): 1999 catera
    Join Date
    Jun 2013

    Another Caddy shift problem

    First problem was the shift position sensor, or neutral safety switch. Fixed the sluggish not wanting to go problem.

    Now it is doing something different. I do not think it is bad clutches. It pulls good and hard when in gears with no slippage.
    The problem is it is reving too high before shifting and doesn't seem to want to catch over-drive at all. I got it to go once by winding the tach to 6k+, then it hit over-drive, hard. At first I thought it may be low on fluid. Checking it is a pain, no dipstick or filler tube, all done from under the car, but I did it anyway. I am getting an error code TCM not communicating with the ECM. Has anybody seen a bad TCM cause this problem or is it more likely something in the Transmission valve body ? Is there a sensor or switch that controls the shift into Overdrive ?
    A little help here would be appreciated. Thanks.

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  3. #2
    JohnJJO's Avatar
    JohnJJO is offline Cadillac Owners Fanatic
    Automobile(s): 2000 Catera Sport
    Join Date
    Mar 2012
    Wilmington, NC
    I need to know step by step how did u check your transmission fluid ? So I can tell u right way to do it.

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