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Technical Model A rear spring

Discussion in 'Traditional Hot Rods' started by junkyardgenius, Jan 25, 2026.

  1. junkyardgenius
    Joined: Dec 29, 2005
    Posts: 914

    junkyardgenius
    Member
    from Kernow

    I,m running an A spring under the rear of my 34. Using 10 leaves and it gives a nice ride. Over the last year it has started to drop so I made and installed a spacer as a temporary fix. I can have the spring reprofiled ,could also add another leaf but don't want to spoil the ride quality. Any advice?
     
  2. alchemy
    Joined: Sep 27, 2002
    Posts: 22,831

    alchemy
    Member

    If it was an original spring that started to droop, I’d think it might continue. Like it has something wrong.

    If it’s a new spring, maybe that’s as far as it will go. I’d think you could put a little re-arch in it and it would probably hold.

    But I’m no expert.
     
  3. '29 Gizmo
    Joined: Nov 6, 2022
    Posts: 1,198

    '29 Gizmo
    Member
    from UK

    Yes...... Lots of tutorials on ebay on reprofiling springs using a hydraulic press.
     
    warbird1 likes this.
  4. Happydaze
    Joined: Aug 21, 2009
    Posts: 2,401

    Happydaze
    ALLIANCE MEMBER

    New or old spring?

    Dismantled yet? Any clues?

    Chris
     
  5. 1946caddy
    Joined: Dec 18, 2013
    Posts: 2,391

    1946caddy
    ALLIANCE MEMBER
    from washington

    Got any pictures? I'm having a hard time visualizing a Model A rear spring in a 1934 Ford. Unless you're talking about a Model A front spring on the rear and that would be too short.
     
    Last edited: Jan 26, 2026
  6. michaeljames
    Joined: Jan 15, 2026
    Posts: 4

    michaeljames

    It sounds like the spring has slowly lost some of its arch from normal use. Having it professionally re-arched is usually the best long-term fix without hurting ride quality. Adding one thin leaf can also help if matched properly. You might also want to check bushings and shackles, since worn parts can make sagging look worse.
     
  7. ALLDONE
    Joined: May 16, 2023
    Posts: 4,008

    ALLDONE
    Member

    buy a new reversed eye super slider spring... doesn't get any better for a couple hundered bucks..
     
    Illustrious Hector likes this.
  8. Tim
    Joined: Mar 2, 2001
    Posts: 20,601

    Tim
    Member
    from KCMO

    I’m also curious if it is an original spring or aftermarket.

    either way I would let it ride with the spacer until I was confident that it was done continuing to to settle. Then pull the spring pack apart and add some arch back to the main and maybe the next two leafs.


    I’d do it exactly the same as you reverse a main leaf in your garage but use the process to add some arch. Easily done. in an afternoon.
     
    junkyardgenius likes this.
  9. junkyardgenius
    Joined: Dec 29, 2005
    Posts: 914

    junkyardgenius
    Member
    from Kernow

    Thanks for all the replies here. I should have said it's an aftermarket spring. I think it settled as much as it's going now. Had some econoline springs redone by a company here last year and they worked out great.
     
    Tim likes this.

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