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

Mono-Leaf Springs

The inherent danger of Non-OEM designed mono-leaf springs

Yes, the risk-your-life sort of danger

Springs aren’t just for smooth rides and setting ride height, they’re also one of the most important safety considerations built into any car. And it’s pretty easy to see why.

Springs hold your vehicle up and together, away from the pavement, and in tip-top operating shape. They’re the key to the suspension, keeping your butt off the cold, hard, unforgiving pavement.

Essentially, springs are the unsung linchpins of a well-put together vehicle.

So what makes a non-OEM designed mono-leaf spring so dangerous?

It’s right there in the name. Mono-leaf springs, the aftermarket sort, are dangerous because they only have one leaf. They were not designed and tested to perform on the vehicle they are being used for.

One leaf means no support. One leaf means no backups. One leaf means CRACK and you’re screwed.

Multi-leaf springs, on the other hand, are built in a sophisticated manner that puts safety right there in the front lines with everything else you love about a good street rod.

Each leaf in a multi-leaf spring is engineered to provide support, stability, and safety to a vehicle by distributing the load and stress across each leaf, precisely and proportionally. This means longer life for your springs.

And, when one of the leaves eventually breaks (every spring will break eventually), having the extra leaves holding strong will help keep your vehicle on the straight and narrow until you replace them.

So, why is that dangerous?

When the main plate (that is, the one that connects the axle to the vehicle) breaks, the axle is directly affected.

Multi-leaf springs help prevent you from an accident by providing extra support (in the form of extra leaves) when your main leaf breaks.

Mono-leaf springs don’t have that luxury.

When a mono-leaf spring breaks, the entire spring breaks, and it shifts the axle. If it breaks in front of the axle, the axle sifts rearward. If it breaks behind the axle the entire body of your car drops down onto your tires. Tires don’t perform as well with a ton or so of steel weighing down on them.

And that’s not all folks…

When an axle shifts rearward, this causes a major change in control of the vehicle. This can range from a scary jarring of the steering wheel to a complete loss of control. And no, we don’t use the phrase ‘complete loss of control’ lightly.

Multi-leaf springs don’t have this problem. In fact, it’s extremely rare for the axle to move at all when a multi-leaf spring breaks. Most people don’t even notice it.

Mono-Leaf Springs Fail Sooner…Or Fail Harder

Aftermarket mono-leaf springs are either designed with an even taper, which doesn’t distribute stress and load evenly, or are overbuilt which causes the spring to be way too strong for the application. It will ride harder (and it will break faster, funny enough.)

Exceptions to the rule

Why do mono-leaf springs exist if they’re so dangerous? Heck, GM used mono-leaf springs! So did Ford and Chrysler.

That’s true, they did. But they spent tens of thousands of dollars and hundreds of hours perfecting and testing their designs.

Why buy ours? Are we hypocrites? No, we’re not. We’re knowledgeable.

We use the Original GM Blueprints to make our Mono-Leaf springs for the Chevy II, Camaro, Firebird and Nova cars. (But no, we do not make them for the Ranger or Mini-Vans)

Does our Mono-Leaf spring break? Like we said earlier, all springs will eventually break, and a well-designed spring will break were it is designed to. And every one of our springs that have broke has done so right at the axle, were it is held in place by specially designed rubber isolator pads for that exact reason. (Who would have thought GM engineers would have been so thorough?)

But Multi-Leaf Springs Suck!

I know the feeling, especially if you had your heart set on mono-leaf springs for an exceptional ride. The good news is, if you feel this way, you’re absolutely wrong.

We have been manufacturing leaf springs since 1937. If you want her low and smooth, give us a call, and we’ll have you riding away in style (and safety.)

Filed Under: Spring Tech Article Tagged With: Collector Car Tech, Leaf Springs, Manufacturing Springs

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OEM Replacement & Custom Springs

  • Classic Cars Springs, Hot Rods, & More
  • Over 24,000 OEM Spring Blueprints
  • 166,000+ Stock Spring Applications
  • Design Staff Available For Custom Applications
  • 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:

  1. Call Us at 1 (313) 963-3839
    For Quickest Order Completion
  2. Fill Out Our Quote Request Form
    To Spell Out Details
  3. Browse For Parts Online
    To Browse By Make, Model, Body Style, & Engine Size

Quick Spring Tech Videos

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Need Spring Wisdom?

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We love helping with any leaf or coil spring problem.

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

  • About EATON Detroit Spring, Inc.
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Locate & Connect To EATON Detroit Spring

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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