CDV transmission problems

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500, 472, 425, 368 Discussion, CDV transmission problems in Cadillac Engine Technical Discussion; CoupeDeVille 1970 472CUI TH 400 trans. Had to swap the transmission for an otherone as the tailbit was broken on ...
  1. #1
    richzan is offline Cadillac Owners Member
    Join Date
    Apr 2004

    Angry CDV transmission problems

    CoupeDeVille 1970
    TH 400 trans.

    Had to swap the transmission for an otherone as the tailbit was broken on mine.
    The scrapyard gave me a TH400 from a Pontiac and this did not work, later I got one from an Oldsmoble, that did not work either.....
    Is it possible to exchange transpossions from Pointiac Oldsmobile and Cadillac??
    It works for like 5kms and then it makes a strange noise and it dont want to move anymore. My doubt is the connection with the torq-convertor and engine.
    Somebody know what I can do to overcome this problem?
    Will be great!

    Regards Richard Zandijk

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  3. #2
    DaveSmed's Avatar
    DaveSmed is offline Cadillac Owners Connoisseur
    Automobile(s): 1968 Cadillac Sedan deVille, 1994 Chevrolet G20
    Join Date
    Aug 2003
    Bucks County, PA

    Re: CDV transmission problems

    It sounds like you got some duds. If it bolts up correctly, it should work, because it is pretty much self contained. That's if it bolted up correctly, based on your "worked for 5 kms" statement, it did. Was anything visually wrong with the flexplate on the back of the engine befoe you bolted the converter up? Also, is the converter all the way back, and engaged with the front pump on the trans?

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