84deville rear coil spring and shock replacement

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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, 84deville rear coil spring and shock replacement in Past Cadillac Vehicle Discussion; Hi all , long time lurker first time poster. So, I have my grandfather's 84 coupe deville. The air ride ...
  1. #1
    84decille is offline Cadillac Owners Member
    Automobile(s): 1984 Sedan de Ville
    Join Date
    May 2014

    84deville rear coil spring and shock replacement

    Hi all , long time lurker first time poster.

    So, I have my grandfather's 84 coupe deville. The air ride system is shot and the rear is beginning to sag. I want to convert to a ordinary shocks and coil springs back there. Now, I know there are conversion kits online, but they all seem to start at 85! Of course, the auto parts stores have shocks (gas) and coil springs. Could I simply swap those in and forget the air ride? Seems to be lots of discussions but not for this particular vintage of Cadillac. Well thanks all, for your time. All ideas are appreciated.

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  3. #2
    Angry Matt's Avatar
    Angry Matt is offline Cadillac Owners Enthusiast
    Automobile(s): (2) '81 FWBs, '86 Cutlass Supreme
    Join Date
    May 2009
    Limerick, PA

    Re: 84deville rear coil spring and shock replacement

    Two of the '81's I've owned got the air ride swapped out for plain old shocks, no conversion kit or anything like that, although both were used with Eibach lowering springs, I can't see there being any difference with stock height coils.

  4. #3
    csbuckn is online now Cadillac Owners Master
    Automobile(s): 84 Coupe w/500
    Join Date
    Jan 2008

    Re: 84deville rear coil spring and shock replacement

    Two options...replace the shocks only with air shocks that you would run the air line and fill valve behind the license plate and fill it yourself to your liking...or replace shocks and springs for non-air model shocks/springs. I personally would rather run air shocks with the fill valve behind the license plate.

  5. #4
    carnut is offline Cadillac Owners Master
    Automobile(s): 1988 Allante' (sold), 1984 Eldorado, 84 Sedan DeVille
    Join Date
    Feb 2003

    Re: 84deville rear coil spring and shock replacement

    The 78 Sedans and Coupes came stock without auto leveling. It was an option. Get those springs. Any "C " body GM car of that era, Buick, Olds Pontiac most likely wont have level ride. The level ride coil springs were softer and if not used with air leveling shocks, would have a lower ride height. On my 84 Sedan, I also got the fat rear sway bar from a Buick station wagon or Chevy Caprice cop car. Makes a big difference when turning a corner at speed. I also used the stiffer urethane orange front sway bar bushings.

  6. #5
    the APEMAN is offline Cadillac Owners Fanatic
    Automobile(s): 1980 FBC
    Join Date
    Mar 2010

    Re: 84deville rear coil spring and shock replacement

    The sway bars are nice to have. Never tried extreme road racing but I liked the fat Monte Carlo rear sway bars better than thin Fleetwood ones.

    I've tried all kinds of stuff on this body and the best ride quality comes from coil springs that don't have quite enough to hold the car to proper ride height. The ride height is established with air shocks which might only need 30 or so lbs. Manual fill as suggested keeps it simple.

    Air makes for a really nice mannered vehicle.

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