Help your heavy-duty pickup carry its weight and payload with the Dorman leaf spring, part number 43-1705. This rear replacement is designed for the 2008-2016 Ford F-350 Super Duty and the 2008-2016 Ford F-450 Super Duty.
Leaf springs hold up the vehicle and its load, and they are central to suspension performance and passenger comfort. If a spring on your truck has sagged, cracked or corroded, this leaf spring assembly is intended to take its place in the rear suspension.
- Direct replacement: Designed to install like the original leaf spring on the listed trucks, with the same fit and function.
- Ideal solution: Replaces springs damaged by overloading, collision, cracking or corrosion, as well as springs that are simply due for replacement.
- Durable construction: Built from quality materials to strict specifications for dependable service.
- Trustworthy quality: Engineered, manufactured and supported by Dorman, which describes itself as the premier aftermarket leaf spring provider in the USA.
The rear leaf springs work as a left/right pair, so we recommend replacing both sides together to help keep ride height level and the load evenly supported. See the "Vehicles it fits" section for complete fitment details.
Interchange: 43-1703 · 43-1957 · 43-1959 · 43-1705DAY · 43-1705HUS · 043-1705-00
431703 · 431957 · 431959 · 431705DAY · 431705HUS · 043170500 · 7C345560DF · 7C345A975DF · 7C34D · 7C34DE · 7C34DF · 7C3Z5560DB
This part cross-references / interchanges with the following part numbers:
43-1705, 43-1703, 43-1957, 43-1959, 7C345560DF, 7C345A975DF, 7C34D, 7C34DE, 7C34DF, 7C3Z5560DB, 43-1705DAY, 43-1705HUS, 043-1705-00
Frequently Asked Questions
Which trucks does this rear leaf spring fit?
It is a rear leaf spring for the 2008-2016 Ford F-350 Super Duty and the 2008-2016 Ford F-450 Super Duty. See the "Vehicles it fits" section for full fitment details.
What does a leaf spring do?
It holds up the weight of the truck and its payload as part of the rear suspension, and it plays a key role in suspension performance and ride comfort.
What are signs a rear leaf spring may need replacing?
Common signs include a sagging or uneven rear ride height, cracked or broken leaves, heavy corrosion, or the rear bottoming out under load. Inspect the suspension to confirm the cause before replacing parts.
Should I replace both rear leaf springs at the same time?
Yes, we recommend replacing both sides together. Doing so helps the rear sit level and share the load evenly.
What causes leaf springs to fail?
Overloading, collision damage, cracking and corrosion are common causes. Springs can also simply reach the point where they are due for replacement.
