1984 Sedan Deville problems
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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, 1984 Sedan Deville problems in Past Cadillac Vehicle Discussion; My transmission recently went out car wont reverse when pressing gas on reverese ir just revs when going on drive ...
  1. #1
    dmuny is offline Cadillac Owners Member
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    1984 Sedan Deville problems

    My transmission recently went out car wont reverse when pressing gas on reverese ir just revs when going on drive it gets stuck on 20mph i let go of gas thenswitches gear and gets stuck at 30 now.... I found a transmission for 150 off a 84 fleetwood de elegance will it fit the 84 sedan deville is it compatible? And my ac only blows now when im driving the car on idle no air comes out at all unless driving it and grom the bottom at that but its still icy cold help me im a young 21 year old and not planning on selling this car anytime soon thanx guyd last time i had troible i came to yall and got it done!!!!


    Cadillacin from houston tx

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  3. #2
    csbuckn is offline Cadillac Owners Master
    Automobile(s): 84 Coupe w/500
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    Re: 1984 cadillac sedan deville problems

    Tranny will fit just fine, direct bolt in. No air at idle sounds like maybe an idle load compensator. Air on floor only could be a blend door motor not directing air or maybe your HVAC head unit.

  4. #3
    dmuny is offline Cadillac Owners Member
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    Re: 1984 cadillac sedan deville problems

    Csbuckn ur the one that helped me last time appreciate that edm worked just fine where is the idle load compensator located at

  5. #4
    j2rossit is offline Cadillac Owners Enthusiast
    Automobile(s): 85 FW Brougham, 68 Wildcat 'vert, 92 & 96 Roadmaster Wagons
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    Re: 1984 cadillac sedan deville problems

    I'm having a tough time making it through your post. But from what I gather, the blower motor is not pushing air when your not moving? But when you start driving and it does push air, it only comes from the floor vents? Sounds to me like there is a vacuum problem if it only comes from the floor, but I'm sure someone here would be able to confirm/deny that.
    Are you sure that the blower motor is working when your driving, or could air be forcing it's way through the system due to your motion?

  6. #5
    csbuckn is offline Cadillac Owners Master
    Automobile(s): 84 Coupe w/500
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    Actually, I think j2 is on the right track with checking vacuum lines because the idle load compensator and hvac system rely on vacuum to work correctly. I'm not sure where an idle load compensator would be on the 4100 but I would start with checking all the vacuum lines.

  7. #6
    dmuny is offline Cadillac Owners Member
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    Re: 1984 Sedan Deville problems

    Yea air is on coming when i press the gas in motion im pretty sure its working because i dont have to be going fast and its cold at that ill check the vacuum lines then and go from there....the trick i used to do was put the temperature up the. But it all the way down to 60 and it would change to the vents on top

  8. #7
    carnut is offline Cadillac Owners Master
    Automobile(s): 1988 Allante' (sold), 1984 Eldorado, 84 Sedan DeVille
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    Re: 1984 Sedan Deville problems

    21 and can't form a legible sentence! I'll bite my 66 year old lip.

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