Torque is more than the force required to open a beer bottle. The proper torque will keep your leaf spring from breaking. Use your manufacturer’s torque specs when tightening your U-bolts, or use our recommendations. U-bolts provide the clamping force required to hold leaf springs to the axle and the right torque is very important. […]
Leaf Spring Tech Articles, Videos, and More
Since 1937, we have manufactured leaf springs for the automotive industry, restorations, street rods, NASA, and even Oscar Meyer Wienermobiles. If you have a question about leaf springs, odds are we answered it below or would be happy to help.
Browse dozens of tech articles, videos, and answered questions from our Ask The Spring Guru page.
How To Properly Torque Your Leaf Spring’s U-Bolts
U-bolts are what provide the clamping force needed to hold your springs to the axle. Any movement in the center bolt area can cause a spring to break so follow your manufacturers recommendations. If that is unavailable, use our recommendations your springs will thank you. Remember, torque your bolts to the recommended specifications immediately upon […]
Five Keys To A Good Leaf Spring Suspension
Here are the five key factors to keep in mind when working with leaf spring suspensions for your classic car or hot rod. Making of a good leaf-spring suspension is pretty darn easy if five basic rules are followed. Use Multi-Leaf Springs Rule number one for making a good leaf spring suspension is the use […]
Installing Model A Leaf Springs
Model A springs need to be stretched around six inches before you’ll be able to install them into your vehicle. Rear Model A springs whether used on an original Model A, a street rod, or a restomod, can be a bugger to install. Not in the car, typical eye to eye length’s around 39 to […]
How To Readjust Tip Inserts Into Place
Sometimes tip inserts get whacked out of place during delivery. Here’s how to fix it with a screwdriver. Unfortunately, every now and then when leaf springs shipped through FedEx or UPS get banged around the tip inserts at the end of the spring can come out of the holes. To put them back in place, […]
Three Types of Leaf Spring
There are three types of leaf springs. Multi-Leaf Springs Multi-leaf springs are made up from heat treated strips of SAE 5160 Steel, in diminishing lengths, formed to a predetermined arch and held together by a bolt to the center. Mono-Leaf Springs Mono-leaf springs are a single heat treated plate of steel whose thickness is uniformly […]
Leaf Spring Ends And Hysteresis
Which leaf spring end-type is best for trucks, and which end-type gives you the smoothest riding springs? There are three basic types: square, diamond point, and rolled. Square Ends Square, or constant thickness ends, are great for trucks, terrible for cars. It puts a concentration of all the pressure at the end of the leaf, […]
How To Paint Leaf Springs
First step, make sure it’s done in a well-ventilated area. Hang the spring by one of its eyes. Start by wiping the spring with acetone to remove any contaminates: grease oil dirt etc. Use a good quality high-temperature engine paint, color of your choosing, and give the springs three, four, or five light coats of […]
How Easy Changing Leaf Springs Really Is
You’ve seen our leaf spring removal and reinstallation videos, but those are polished and edited for brevity. When you work on your springs yourself, you may find things don’t always go as smooth at the textbooks. This One Minute Monday is two minutes long to make a point.
How To Reinstall A Rear Leaf Spring
Watch as Mike explains the steps for how to install rear leaf springs. Start by putting in the front eye bolt. Do not tighten! Then attach the shackle again. Do not tighten! Raise the spring to the axle. Make sure the center bolt is in the hole. Install new U-bolts. Again, do not tighten. Reinstall […]
How To Remove A Leaf Spring
Block the tires! We don’t want to roll Raise the vehicle Place jack stands under the axle, both for safety and to keep the axle in place Remove the tire Remove the shock Remove the U-bolts Remove the rear shackle Remove the front eye bolt Voila! The spring will be in your hand.
What Are Tip Inserts Used For In Leaf Springs?
At the end of the leaves on many leaf springs, you’ll see what’s called tip inserts. The purpose of these inserts is to help reduce interleaf friction. Every manufacturer has their own idea on how they should look, how they should attach, and how they should be held in the spring. The video above has […]
How To Use The Ordering Form
Here we show how you can use the online ordering form to have springs manufactured for your exact vehicle.
How To Order Leaf and Coil Springs Online
Go to the ordering page here.
How To Measure Leaf Spring U-Bolts
This week, Mike explains the two different types of U-bolts you may encounter and how to measure them. Let’s start with the shape. We have square, we have round. Square U-bolts typically go over the spring, the round U-bolts typically go over the axle. Let’s measure the U-bolt. First thing we need to know is […]
Busting Suspension Myths Slideshow
Mike will be at the Kentucky Expo Center for the NSRA Street Rod Nationals this Thursday busting suspension myths to pieces. Preview his presentation below and be sure to catch it if you go!
How We Make Our Leaf Springs (6 Minute Video)
Should I Replace One Broken Leaf Or Whole Spring?
Q – “I have a 1966 Imperial with one broken leaf. Should I replace just the broken leaf or the whole spring or both springs”? A – We find in very few cases that once the old spring is taken apart that the rest of the leaves are any good. Age and use takes its […]
How Leaf Springs Are Made
We manufacture leaf springs all year long, and one thing everybody who comes to the shop wants to see is how it’s made. Well, not everyone can make it out to Michigan and Trumbull in Detroit, so we made this six minute video with Jeff Ford of Autorestomod to give you a special look into […]
Mono-Leaf Springs
Are mono-leaf springs dangerous? Only if you buy from the wrong people.
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