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Leaf springs are the oldest type of springs, dating back to the days of horse-drawn carriages, and the simplest type of suspension system. Two leaf springs mounted parallel with the frame rails are commonly used with straight and beam-type axles, where they not only provide spring function but also locate the axle on the vehicle. Single leaf springs have also been used with independent front and rear suspensions where the spring is mounted transversely.

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A leaf spring is composed of one or more lengths of arched spring steel. Single leaf springs are called mono leaf springs, while multi leaf springs have several progressively shorter leaves. The ends of the mono or main leaf are formed into “eyes” at each end to accept the bushings through which the spring-to-frame mounting hardware is installed. U-bolts and mounting plates secure the springs to the axle.

The most common symptom of worn springs and reason for spring replacement is incorrect vehicle ride height. Sagging springs will lower the chassis of the vehicle, which can result in bottoming out, poor handling and abnormal tire wear. Vehicle manufacturers publish ride height specifications. Measure the ride height at the recommended locations and compare the measurement with specs. Leaf springs should be visually inspected for cracks, missing or broken leaves, worn shackle and spring eye bushings, and damaged U-bolts.

If measurement and inspection proves your springs are in need of replacement, we have the original equipment specification leaf springs that will restore ride height and ride quality. We also have all the parts you need for a complete repair and to make sure the spring is mounted properly – spring eye and shackle bushings, complete shackle and spring hanger assemblies, U-bolt kits, and spring pads. And if you need to haul heavier cargo in your pickup, we have helper springs in a wide range of load capacities. They’re designed to be used with your OE springs and won’t adversely affect ride when you’re driving unloaded.

The front of the leaf spring is usually mounted directly to the frame, but because leaf springs elongate as they compress, shackles are commonly used at the rear, with one end of the shackle attached to the frame and the other to the spring. Small, lightweight cars are generally equipped with mono leaf springs, while multi-leaf springs are used on heavier vehicles and for carrying heavy loads, which is why they are regularly used at the rear on trucks. Because leaf springs support the vehicle weight and connect the axle to the vehicle, in effect spring and suspension member, their condition is critical to vehicle safety.

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Guides & Articles

  • Auto Repair Parts
    The springs in your vehicle probably aren't something you think about until there's a problem or you've decided to upgrade suspension parts in the interest of sportier handling. But what specifically do springs do? In short, they play a major role in the safe handling and ride comfort of your vehicle. Not only do they keep a vehicle at a designated standing height, they provide recoil necessary to bounce back after suspension components move up and down over uneven road surfaces. By themselves, springs will continue to bounce up and down for a long time unless a motion damper such as a shock absorber is present to keep things stable. Springs can be soft and extremely bouncy, or they can be stiffer and less bounce-prone.
  • Auto Repair Parts
    Very often we don't even realize what a crucial role a car's suspension plays in providing a safe and comfortable ride. The system maximizes the friction between the road surface and your vehicle's tires, ensuring steering stability along with responsive handling.
  • Auto Repair Parts
    The very first thing to know about timely suspension system diagnosis is that the stability and steering control of your vehicle and, what is more important, your safety on the road depends on how often you make it. Automotive suspension belongs to one of those car systems that are constantly exposed to high loads and thus are prone to wear and tear. Most specialists recommend inspecting suspension system after every 6,500-7,500 miles or when there are any signs of its breakage.

Leaf Springs & Components Reviews

Average rating:  5  4.9 - 29 reviews
Read All Leaf Springs Reviews
5 of 5
1978 Jeep CJ / Posted by George (Silver City, NM) /

High quality rubber bushings. Found no blemishes in the rubber. Upon installation, the outside diameter was smaller than the original bushings thus not having a firm slip fit, but a loose fit. Overall very satisfied with the item and value.

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