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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » rear springs??

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    6/05/2025 8:37 AM  #1

    ponch0v
    FYI Addict

    Offline

    From: Coeur d'Alene, ID
    Registered: 4/01/2013
    Posts: 147

    rear springs??

    What is the current recommended brand of leaf springs that yall are using? std and dropped.
     

     

    6/05/2025 12:48 PM  #2

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,657

    Re: rear springs??

    Generally I think most would recommend 4.5 leaf springs.  Better control of wheel hop without an overly harsh ride.  As far as manufacturer I would also suggest checking stock, because these were hard to get the last time this question was fielded.  Most places were out of stock.  I've used Eaton/Detroit spring with great results, but they have gotten pricey in recent years.  

     

    6/07/2025 6:01 AM  #3

    BobE
    Senior 24-7 FYI Addict

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    From: White Plains, NY
    Registered: 4/04/2013
    Posts: 2,773

    Re: rear springs??

    I replaced my rear springs on my 65 with Detriot Speed,4.5 leaf versions (#040104) last year and am happy with them.  I did remove the 1" lowering blocks that had been installed years ago, and the ride height is about same with the Detriot Speed springs. 
    I did post pictures on the forum last year. 

    65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
     

    6/08/2025 11:10 AM  #4

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,435

    Re: rear springs??

    4-1/2 leaf, reverse eye works great on my 66 fastback with 427 stroker, 17x8 wheels with 245x45 tires

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    6/08/2025 11:23 AM  #5

    RTM
    Senior 24-7 FYI Addict

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    From: Cape Coral FL
    Registered: 5/22/2019
    Posts: 1,899

    Re: rear springs??

    Many years ago I learned that not all leafs are the same.  I highly suggest paying for a well known brand. 

    On my old Mustang I had the Mustang Plus 4.5 reverse eye leafs.   Loved them.

     

    6/08/2025 3:30 PM  #6

    BILLY WALTON from GEORGIA
    Carrollton, GA Bash Host

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    From: CARROLLTON GEORGIA
    Registered: 4/14/2013
    Posts: 2,593

    Re: rear springs??

    MS wrote:

    4-1/2 leaf, reverse eye works great on my 66 fastback with 427 stroker, 17x8 wheels with 245x45 tires

    Did anyone ever find any 4.5 reverse eye . I use to buy them at  MustangPlus then later Opentracker was selling them. Then they were all backordered and then none at all.

    Its really me....I fixed my caps lock .
     

    6/08/2025 5:51 PM  #7

    Rudi
    Senior 24-7 FYI Addict

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    From: Stuck in the 50's Welland Ca
    Registered: 4/01/2013
    Posts: 4,009

    Re: rear springs??

    Try Eatondetroitspring.com, they custom make springs according to your car specs.$$$$$$

    Good work ain't cheap, Cheap work ain't good!   Simple Man
     

    6/08/2025 7:26 PM  #8

    Rudi
    Senior 24-7 FYI Addict

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    From: Stuck in the 50's Welland Ca
    Registered: 4/01/2013
    Posts: 4,009

    Re: rear springs??

    It’s all on their web site.

    Good work ain't cheap, Cheap work ain't good!   Simple Man
     

    6/09/2025 5:32 AM  #9

    BILLY WALTON from GEORGIA
    Carrollton, GA Bash Host

    Offline

    From: CARROLLTON GEORGIA
    Registered: 4/14/2013
    Posts: 2,593

    Re: rear springs??

    Rudi wrote:

    It’s all on their web site.

    I will check them out. They are expensive compared to others for sure.

    Its really me....I fixed my caps lock .
     

     

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