Question about 1996 Cadillac DeVille

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I have a 1996 caddy sedan deville which does not seem to go into third gear. I checked the fluid and level is fine but a bit foamy. It has 100k miles on it. Should I change the xmission fluid and filter as a start? Thanks.

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  • rickslt Nov 18, 2009

    Mr TransDoktor, Thanks for your prompt response, but IN regards to this 96 Caddy deville:
    Right before I started having this up shift problem from 2nd to third gear my battery died due to leaving an interior light on. I was wondering if this has anything to do with this problem--ie maybe the computer needs to reset or be reset?

  • rickslt Nov 18, 2009

    Additional info: I just took it to a Cadillac dealer and the tech said it was not returning any fault codes!! Since this is the case the tech said it has to be internal and must therefore be replaced? Any input Transdoktor would be very helpful. I don't know if that is the easy way out or should I get another opinion? I do not know enough this to say anything intelligent.
    Thanks, Rick

  • rickslt Nov 19, 2009

    Thank you transdoktor, I will take it for a 2nd opinion from a long time transmission shop for sure, but I do not understand how it can have no codes. This basically says it is operating fine and it is not. Shouldn't it indicate something? Is it possible that the linkage is slipping past Drive and right into 2nd gear? Or maybe since I have never had to change the fluid and filter could the viscosity be off? I am just searching for better news I suppose. Thanks again for all your help. You are terrific!!
    Rick

  • rickslt Nov 20, 2009

    Thank you transdoktor, I will take it for a 2nd opinion from a long time transmission shop for sure, but I do not understand how it can have no codes. This basically says it is operating fine and it is not. Shouldn't it indicate something? Is it possible that the linkage is slipping past Drive and right into 2nd gear? Or maybe since I have never had to change the fluid and filter could the viscosity be off? I am just searching for better news I suppose. Thanks again for all your help. You are terrific!!
    Rick

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The fools that built the transmission used plastic soliniod controls in the valve body inside the transmission.These are broken.They cost about eighty five dollors from the dealer.The bad news is the transmission bottom needs to be removed to do the repair.The good news is the transmission does not need to be removed from car.

Posted on Nov 22, 2009

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Changing the fluid and filter will not correct a no upshift issue. The transmission on this car is computer controlled. You should have it scanned for codes. Very common issue on these is the turbine speed sensor fails, which does require removing the transmission to replace.

Posted on Nov 16, 2009

  • David Moyer Nov 18, 2009

    At this point, with no third gear, and no available codes, I would have to agree with the dealers diagnosis. You may however, get another opinion by a reputable transmission shop in your area. Hope I have helped you out.

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My mechanic repaired mine for $250.00 parts and labor. Trans does not have to be removed.

Posted on Dec 05, 2009

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