Transmission ?? / engine temp light.

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500, 472, 425, 368 Discussion, Transmission ?? / engine temp light. in Cadillac Engine Technical Discussion; What's up !! I've got a 68 coupe that I want to put a trans in it that has over ...
  1. #1
    Dave.pristine is offline Cadillac Owners Member
    Automobile(s): 1968 coupe deville
    Join Date
    Feb 2013

    Red face Transmission ?? / engine temp light.

    What's up !! I've got a 68 coupe that I want to put a trans in it that has over drive. I was thinking of the 700r4. Any comments or help as to make my trans decision
    easier for of my buddies said that I may need an adapter or something of that nature to mate it up with the 472. Any help would be greatly appreciated.

    Second problem I have had is the engine temp light. I can't seem to figure. Exactly what it is. I have read online about some guys with the same issue. Some say it is linked to the pin switch on the driver side door for the dome switch. I have looked for the pin switches online to purchase and can't seem to have any luck. Mine are both bad. I have them disconnected and still is one. At help on this issue wild be greatly appreciated as well

    Thank guys in advance
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  3. #2
    drmenard is offline Cadillac Owners Connoisseur
    Automobile(s): 95 fleetwood 81 deville
    Join Date
    May 2003

    Re: Transmission ?? / engine temp light.

    Your over temp light and buzzer is turned on by a temp switch on the drivers side head in the back near the fire wall close to the last sparkplug.. It has only wire going to it.. Just pull the wire off or try to find a good sensor temp switch...
    Forget trying to put a 700r4 or a 200 4r in there.. they won't hold up to the weight of the car and the torque of the motor.. A 4L80e would work , but it needs a computer to run it.. A bullet proof way to get over drive is with a gear vendors unit.. It will bolt to the back of the th400 and have to shorten the driveshaft...

  4. #3
    The Ape Man's Avatar
    The Ape Man is offline Cadillac Owners Connoisseur
    Automobile(s): '80 Fleetwood Coupe, 1994 and 1995 Mercedes 140 Coupe
    Join Date
    Feb 2005
    Southern NJ

    Re: Transmission ?? / engine temp light.

    If the engine had been paart the blower relay enable sensor and the engine hot sensor could have been switched. Symptom would be engine hot lamp comes on as soon as engine warms up in cold climates. The lamp would probably stay on all the time in warm climes.

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