OE Quality
60-Day Returns

Dorman 43-1851 Leaf Spring Assembly - Rear
Durable Leaf Spring Assembly for Ford F-250 Super Duty
The Dorman 43-1851 leaf spring assembly is engineered to restore the suspension performance of your Ford F-250 Super Duty. Constructed from high-quality steel with a black finish, this rear leaf spring pack offers reliable support and consistent load handling for standard replacement needs.
- Made from durable steel material with a corrosion-resistant black coating
- Includes four leaves with a 3-inch width and 7-inch arch length for balanced suspension
- Designed for rear axle orientation on Ford F-250 Super Duty models
- Load rate of 2700 lbs suitable for standard suspension replacement
- Comes with black bushings included for smooth operation and reduced noise
- No axle modification or helper spring required for installation
- Pack thickness measures 2.576 inches, ensuring proper fit and ride height
Product Details and Specifications
The Dorman 43-1851 leaf spring assembly is a direct replacement part designed specifically for the rear suspension of Ford F-250 Super Duty trucks. Featuring a four-leaf pack with a 3-inch leaf width and a 7-inch arch length, this assembly provides a load rate of 2700 pounds, making it suitable for standard suspension grade applications. The steel construction ensures strength and durability, while the black bushings included help maintain smooth articulation and reduce wear. This leaf spring assembly does not require any axle modifications or additional helper springs, simplifying the replacement process.
Common Applications and Problem Resolution
- Restores sagging or worn rear suspension on Ford F-250 Super Duty trucks
- Addresses uneven ride height and poor load handling
- Eliminates excessive rear-end bounce and improves vehicle stability
- Replaces cracked or broken leaf springs to maintain safe suspension performance
- Corrects noisy or stiff suspension caused by worn bushings
Installation Notes and Tips
Installation of the Dorman 43-1851 leaf spring assembly requires no axle modifications or additional helper springs. Ensure the vehicle is properly supported and the rear axle is safely secured before beginning replacement. Since mounting hardware is not included, reuse existing hardware if in good condition or source appropriate fasteners separately. Proper torque specifications should be followed to maintain suspension integrity and safety.
Quality Assurance and Warranty
Dorman manufactures this leaf spring assembly to meet or exceed OEM standards for fit, form, and function. The steel construction and included bushings contribute to long-lasting suspension performance. While specific warranty details are not provided, Dorman products typically come with a limited warranty against defects in materials and workmanship, offering confidence in the product's reliability.
| Brand | Dorman |
| Part Number | 43-1851 |
| Material | Acero |
| Material | Steel |
| Bushing Color | Black |
| Bushing Color | Negro |
| Bushing Color | Noir |
| Color | Black |
| Color | Negro |
| Color | Noir |
| Load Rate | 2700 |
| Suspension Grade Type | Reemplazo estándar |
| Suspension Grade Type | Standard |
| Leaf Quantity | 4 |
| Leaf Width | 3 |
| Axle Orientation | Arrière |
| Axle Orientation | Rear |
| Axle Orientation | Trasero |
| Helper Spring | No |
| Helper Spring | Non |
| Axle Modification Needed | No |
| Axle Modification Needed | Non |
| Bushings Included | Oui |
| Bushings Included | Sí |
| Bushings Included | Yes |
| Mounting Hardware Included | No |
| Mounting Hardware Included | Non |
| Length Axis 1 | 33.188 |
| Length Axis 2 | 33.188 |
| Pack Thickness | 2.576 |
| Leaf Spring Arch Length | 7 |
| Spring Research Institute Number | 43-1851 |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2016 | Ford | F-250 Super Duty | Rear | 3 Leaf / 1 Leaf = 4 Leaf Spring; 2.5625 In. Pack Thickness; 2,700 Lb. Average Capacity; wo/Helper Springs; Includes U-Bolt Plate |
| 2015 | Ford | F-250 Super Duty | Rear | 3 Leaf / 1 Leaf = 4 Leaf Spring; 2.5625 In. Pack Thickness; 2,700 Lb. Average Capacity; wo/Helper Springs; Includes U-Bolt Plate |
| 2014 | Ford | F-250 Super Duty | Rear | 3 Leaf / 1 Leaf = 4 Leaf Spring; 2.5625 In. Pack Thickness; 2,700 Lb. Average Capacity; wo/Helper Springs; Includes U-Bolt Plate |
| 2013 | Ford | F-250 Super Duty | Rear | 3 Leaf / 1 Leaf = 4 Leaf Spring; 2.5625 In. Pack Thickness; 2,700 Lb. Average Capacity; wo/Helper Springs; Includes U-Bolt Plate |
| 2012 | Ford | F-250 Super Duty | Rear | 3 Leaf / 1 Leaf = 4 Leaf Spring; 2.5625 In. Pack Thickness; 2,700 Lb. Average Capacity; wo/Helper Springs; Includes U-Bolt Plate |
| 2011 | Ford | F-250 Super Duty | Rear | 3 Leaf / 1 Leaf = 4 Leaf Spring; 2.5625 In. Pack Thickness; 2,700 Lb. Average Capacity; wo/Helper Springs; Includes U-Bolt Plate |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.