Are 2001 y code transmissions AAN and VAN interchangeable?
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Northstar Engines and System Technical Discussion Discussion, Are 2001 y code transmissions AAN and VAN interchangeable? in Cadillac Engine Technical Discussion; Does anyone know if they are different? I want to put an AAN with new seals and TC into a ...
  1. #1
    PaleAle is offline Cadillac Owners Fanatic
    Automobile(s): 2004 Deville, 01 SLS, 00 STS, 04 C5 Convert 67 Stang Convert
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    Are 2001 y code transmissions AAN and VAN interchangeable?

    Does anyone know if they are different? I want to put an AAN with new seals and TC into a car I'm working on to get rid of the TCC clutch code. I can get the trans for $100, much cheaper than repairing the other one. Mine is VAN. The engine is out of the car right now so if I can fix it with this swap it would be worth it.
    Thanks!

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  3. #2
    Manic Mechanic is offline Cadillac Owners Fanatic
    Automobile(s): 2001 DeVille
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    Re: Are 2001 y code transmissions AAN and VAN interchangeable?

    I also have a 2001 DeVille and have noticed the two different calibrations. I've looked through repair, TSB, and replacement part data and can't find any mention of the two separate 01 transmissions. There are only one each of hydraulic diagrams and wiring diagrams. They are serviced and replaced with the same assembly or service parts, the only options on the parts diagram blow ups are 2 bolts vs. a stud bolt on the exterior. I can only tell you that it's not a major difference. If anything it's a middle of production year valve-body calibration change to address some minor fault or shift pattern issue. My gut feeling is they will interchange satifactorly and I doubt you'll notice a difference. But that's just a hunch based on experience and what I've looked at concerning the same question, then and today. If any body else knows any different I'd like to hear it also in case mine ever kills over.

    Vernon

  4. #3
    PaleAle is offline Cadillac Owners Fanatic
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    Re: Are 2001 y code transmissions AAN and VAN interchangeable?

    The car is back on the road and running fine. No codes and it seems to act and shift normally. I would consider them interchangeable. Now I wonder if different years that use the same safety neutral switch and shift controls are too. I suspect they are, excepting the 9 vs Y difference of course.

  5. #4
    Manic Mechanic is offline Cadillac Owners Fanatic
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    Re: Are 2001 y code transmissions AAN and VAN interchangeable?

    Thanks for the update, it is appreciated. I'm very glad I was correct and didn't steer you wrong. I ended up having my transmission overhauled at the end of my engine work with a clutch and seal kit, remanufactured converter, and I replaced both axle bushings and the TCC solenoid. So far my transmission is perfect.

    Vernon

  6. #5
    PaleAle is offline Cadillac Owners Fanatic
    Automobile(s): 2004 Deville, 01 SLS, 00 STS, 04 C5 Convert 67 Stang Convert
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    Re: Are 2001 y code transmissions AAN and VAN interchangeable?

    Good to hear. Thanks for the help. What are your thoughts on interchanging 01,02,03s?

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