EATON Detroit Spring

The leading manufacturer of leaf and coil springs for the street rod and restoration automotive industries

We Help Maintain American Icons by Manufacturing Leaf and Coil Springs Right Here in America

Phone: 1 (313) 963-3839
Fax: 1 (313) 963-7047

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      We have been manufacturing springs for American vehicles for over 80 years. Our process and expertise has been continuously refined and improved over the century and our Spring Tech section reflects some of that specialty knowledge.

      Browse our many articles, watch videos produced in partnership with AutoRestoMod, and learn all about your spring suspension here.

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  • Click to Call Now: 1 (313) 963-3839
MENUMENU
  • Home
  • Products
    • Suspension Parts
      • Leaf Springs
      • Coil Springs
      • Shocks
      • Attaching Parts And Hardware
      • Installation Kits
      • Leaf Spring Shackle Replacement Kits & Parts
    • Street Rod Suspension Parts
      • Mustang II Front End Springs
      • 48 Inch Truck Springs
    • Allstate - Chrysler
      • Allstate
      • American Motors
      • Bricklin
      • Buick
      • Cadillac
      • Chevrolet
      • Chevrolet Truck
      • Chrysler
    • Daimler - Ford
      • Daimler
      • DeSoto
      • Dodge
      • Dodge Truck
      • Edsel
      • Ford
      • Ford Truck
    • GMC - Jeep
      • GMC
      • Honda
      • Hudson
      • Hudson Truck
      • Hummer
      • International
      • Jeep
    • Kaiser Darrin - Nissan
      • Kaiser Darrin
      • Kaiser-Frazer
      • LaSalle
      • Lincoln
      • MAHINDRA
      • Mercury
      • MG
      • Nash
      • Nissan
    • Oldsmobile - Rambler
      • Oldsmobile
      • Plymouth
      • Plymouth Truck
      • Pontiac
      • Rambler
    • Sterling - Willys
      • Sterling
      • Studebaker
      • Studebaker Truck
      • Toyota
      • Willys
    • Request A Custom Quote
    • Search For Parts Here
  • Spring Tech
    • Learn About Leaf & Coil Springs
      • Spring Tech Articles
      • Tech Questions
      • Spring Tech Videos
      • Featured Elsewhere
      • EATON Detroit Spring Podcast
      • Buy Ford Manuals
    • Spring Tech 101

      We have been manufacturing springs for American vehicles for over 80 years. Our process and expertise has been continuously refined and improved over the century and our Spring Tech section reflects some of that specialty knowledge.

      Browse our many articles, watch videos produced in partnership with AutoRestoMod, and learn all about your spring suspension here.

    • Browse By Topic
      • Leaf Springs
      • Coil Springs
      • Attaching Parts
      • Ride Height & Stance
      • Ride Quality
      • Manufacturing Springs
      • Replacing Springs
      • Modifying Springs
      • Ordering Springs
  • About Us
    • About EATON Detroit Spring
    • Customer Showcase
    • Send Us Photos Of Your Ride!
    • Free Stuff For Car Shows!
    • Facebook
    • YouTube Channel
      • Spring Tech Videos
  • Order Here
    • Lookup & Purchase Your Vehicle's Parts
    • Request A Quote
    • Email Our Sales Team
    • Dealer Information
  • Find Parts That Fit Your Vehicle
  • Click to Call Now: 1 (313) 963-3839

F-Body Leaf Springs

Good Morning,

I have a 1967 Firebird that presently has a mono leaf spring and air shocks. I would like to get rid of the air shocks.

The majority of the time the car is used for cruising with one or two people. However, sometimes my daughters
ride with us to cruises.

We also use the car to go camping and pull a light tent trailer with about a 50 pound tongue weight plus luggage in
the trunk.

Some people suggest that mono leaf springs were used to give a better ride than multileaf springs, True or False?

In the future I may replace my rear axle with one from a newer Camaro because of the greater availability of
gears.

My question is what springs should I buy? Will the springs for this axle also work with axles from newer Camaros?

Lastly, can I pick up these springs from you?

Thanks for your help

Steve

Steve,

Mono leaf springs, being just one leaf, do not have interleaf friction like multi leaf springs do.

The lack of this interleaf friction would make one think that they ride better. However, this is not the case.

The mono leaf spring has a spring rate of 126 Lbs.

Spring rate is the amount of weight it takes to deflect the spring one Inch. Spring rates for multi-leaf springs range from 84 Lbs.up to 126 Lbs. The higher rates are used on bigger engine cars.

Some Interleaf friction is a good thing. Without it the vehicle has to have either a larger sway bar, heavier shocks or a higher rate spring. All these make for a stiffer ride.

The spring rate on the mono leaf has to be higher to make up for the lack of interleaf friction. The make up of a mono leaf is different than a multi-leaf spring in that the leaves of a multi-leaf spring are held together by a centerbolt. The head of the centerbolt fits into a hole in the spring seat on the axle.

The spring seat of cars built with mono leaf springs do not have the hole for the centerbolt. I tell you this because when you replace the axle make sure it from a later car, one with the hole in the spring seat.

When you are ready to change the axle is the time to change the springs.

As for what spring to go with will depend on the ride quality you would like and how often you have to cart the young ones with you and how often you take the trailer.

If this is something you do a far amount of time, then stick with the heavier springs.

And yes, we carry a full line of F-Body springs, we can get you whatever ones you need.

I hope this helps you.

Mike

Filed Under: Tech Question Tagged With: Leaf Springs, Replacing Springs

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OEM Replacement & Custom Springs

  • Classic Cars Springs, Hot Rods, & More
  • Over 24,000 OEM Spring Blueprints
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  • Spring Experts Since 1937
  • Made in Detroit, Michigan
  • Made in the U.S.A.

How To Order Springs For Your Vehicle

To find the correct springs for your vehicle, you need to provide as much information about your car as possible. There is no such thing as a one-size-fits-all spring.

We try to make this easy by providing many ways to order your springs and send in as much information as possible:

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WARNING:

This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
www.P65Warnings.ca.gov

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EATON Detroit Spring, Inc.
1555 Michigan Avenue
Detroit, MI 48216
Phone: 1 (313) 963-3839
Fax: 1 (313) 963-7047
Email: inquiries@eatonsprings.com

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