Dorman 43-1745 rear leaf spring for the 2008-2016 Ford F-450 Super Duty and other vehicles holds the weight and payload of the vehicle at the rear axle. This leaf spring assembly replaces springs damaged by overloading, collision, cracking or corrosion, or due for replacement.
- Dorman OE Solutions line
- Steel construction with 10 leaves, each 3 in wide
- Load rate of 6175 pounds
- Up turned eye at each end
- Black bushings included
- Standard-grade replacement spring without a helper spring
Quick facts
- Part: Dorman 43-1745 leaf spring
- Also called: leaf spring assembly
- Fits: 2008-2016 Ford F-450 Super Duty and other vehicles
- Position: Rear
- Material: Steel
- Condition: New
A rear end that sags or sits uneven, a cracked or broken leaf, or heavy rust can mean a spring has reached the end of its life. Before you replace the spring, rule out worn shackles, tired bushings and loose U-bolts, which can leave the rear sitting low or noisy as well.
Fits
It is a direct replacement for the 2008-2016 Ford F-450 Super Duty and the 2008-2016 Ford F-550 Super Duty. This listing is one leaf spring, and one goes on each side of the rear axle. The truck takes two, so order two and fit them together.
Specifications
Fit and size
- Position: Rear
- Quantity per vehicle: 2
- Length axis 1: 25 in
- Length axis 2: 30.75 in
- Leaf width: 3 in
- Arch length: 3 in
- Pack thickness: 5.778 in
Build and materials
- Material: Steel
- Leaf quantity: 10
- Load rate: 6175 lb
- End attachments: up turned eye at both ends
- Bushings: included, black
- Condition: New
In the box
One leaf spring with bushings included. Mounting hardware is not included, so plan on new hardware, since the old pieces may not be reusable.
Installation notes
- No axle modification is needed.
Interchange: 6C345560BB · 6C345A975BB · 6C3Z5560BB
This part cross-references / interchanges with the following part numbers:
6C345560BB, 6C345A975BB, 6C3Z5560BB
Frequently Asked Questions
Are these 2008-2016 Ford F-450 Super Duty leaf springs for the front or rear axle?
Rear. Dorman 43-1745 is a rear leaf spring, with one on each side of the axle, so the truck takes two.
Do these 2008-2016 Ford F-550 Super Duty leaf springs come with bushings?
Yes. Dorman 43-1745 includes black bushings, but mounting hardware is not included, so plan on new hardware.
What load rate does this Dorman leaf spring have?
Dorman 43-1745 has a load rate of 6175 pounds and 10 steel leaves. It is a standard-grade replacement spring with no helper spring.
How do I tell if a rear leaf spring is cracked or worn out?
Parked and cool, look for a rear end that sags or sits uneven, and notice any clunk when loaded. A shop can inspect the leaves for cracks, rust or breaks.
Does the Dorman 43-1745 need axle modification?
No. Axle modification is not needed, and the spring has an up turned eye at each end.
