Ford part numbers are divided in to 3 sections – A 4-digit Prefix, the Basic Part Number andthen a Suffix The 4-digit Prefix breaks down like this – First Digit: Decade – C5ZZ5560D A = 1940’s, B = 1950’s, C = 1960’s, D = 1970’s, E = 1980’s, F = 1990’s, etc. Second Digit: Year […]
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 […]
Calculating Spring Rate
Mike Eaton explains how to find your coils spring rate using a simple equation. This process is useful for those seeking to cut their coil springs, as it shows how cutting coils lead to a stiffer ride. (Hint: ordering new coils with custom specs, and you can preserve or even enhance your ride quality and […]
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, […]
All About Our Spring Steel
Springs can’t be made from just any metal. They need to be made from a steel that has a high yield strength, helping it retain it’s original shape after significant pressure is applied. Surprise, surprise: a spring’s steel needs to be able to bounce back. So what type of steel would be perfect for building springs? […]