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Dorman 43-559 Leaf Spring Assembly - Rear
Durable Leaf Spring Assembly for Ford F-100 and F-150
The Dorman 43-559 leaf spring assembly is engineered to restore the rear suspension performance of your Ford F-100 or F-150. Constructed from high-quality steel with black bushings included, this replacement part offers reliable support and consistent load handling for your vehicle.
- Constructed from durable steel material for long-lasting strength
- Includes black bushings to reduce noise and vibration
- Standard suspension grade designed for replacement applications
- Five-leaf configuration with 2.5-inch leaf width for balanced load distribution
- Rear axle orientation compatible with Ford F-100 and F-150 models
- Load rate of 1450 lbs to support typical payload requirements
- No axle modification or helper spring required for installation
Detailed Product Description
The Dorman 43-559 leaf spring assembly is a direct replacement designed specifically for the rear suspension of Ford F-100 and F-150 trucks. Made from robust steel, this assembly features a five-leaf pack with a 2.5-inch width per leaf, providing a total pack thickness of approximately 1.826 inches. The leaf spring arch length measures 7.625 inches, ensuring proper fit and suspension geometry. Black bushings are included to help minimize noise and wear, enhancing ride quality. This standard grade suspension component supports a load rate of 1450 pounds, suitable for everyday driving and moderate hauling needs. The assembly requires no axle modifications and does not include a helper spring, simplifying the replacement process.
Common Applications and Problem Resolution
- Restores sagging or worn rear suspension in Ford F-100 and F-150 trucks
- Addresses uneven ride height and poor load handling
- Eliminates excessive rear-end bounce or instability
- Replaces cracked or broken leaf springs to improve safety
- Improves overall suspension performance for daily driving and light towing
Installation Notes and Tips
Installation of the Dorman 43-559 leaf spring assembly is straightforward for experienced technicians. No axle modifications are necessary, and the included bushings facilitate a secure fit. It is recommended to inspect mounting points and hardware before installation, as mounting hardware is not included. Proper torque specifications should be followed to ensure safe and reliable suspension operation.
Quality Assurance and Warranty
Dorman manufactures this leaf spring assembly to meet or exceed OEM standards for material and performance. The steel construction and included bushings contribute to durability and consistent suspension function. While specific warranty details are not provided, Dorman products typically come with a limited warranty against defects in material and workmanship, offering confidence in the product's reliability.
| Brand | Dorman |
|---|---|
| Part Number | 43-559 |
| Material | Acero |
| Material | Steel |
| Bushing Color | Black |
| Bushing Color | Negro |
| Bushing Color | Noir |
| Color | Black |
| Color | Negro |
| Color | Noir |
| Load Rate | 1450 |
| Suspension Grade Type | Reemplazo estándar |
| Suspension Grade Type | Standard |
| Leaf Quantity | 5 |
| Leaf Width | 2.5 |
| 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 | 24 |
| Length Axis 2 | 24 |
| Pack Thickness | 1.826 |
| Leaf Spring Arch Length | 7.625 |
| Spring Research Institute Number | 43-559 |
This part fits 12 vehicles. Search below:
| Year | Make | Model | Drive Type | Position | Notes |
|---|---|---|---|---|---|
| 1979 | Ford | F-100 | RWD | Rear | 4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,450 Lb. Average Capacity |
| 1979 | Ford | F-150 | RWD | Rear | 4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,450 Lb. Average Capacity |
| 1978 | Ford | F-100 | RWD | Rear | 4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,450 Lb. Average Capacity |
| 1978 | Ford | F-150 | RWD | Rear | 4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,450 Lb. Average Capacity |
| 1977 | Ford | F-100 | RWD | Rear | 4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,450 Lb. Average Capacity |
| 1977 | Ford | F-150 | RWD | Rear | 4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,450 Lb. Average Capacity |
| 1976 | Ford | F-100 | RWD | Rear | 4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,450 Lb. Average Capacity |
| 1976 | Ford | F-150 | RWD | Rear | 4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,450 Lb. Average Capacity |
| 1975 | Ford | F-100 | RWD | Rear | 4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,450 Lb. Average Capacity |
| 1975 | Ford | F-150 | RWD | Rear | 4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,450 Lb. Average Capacity |
| 1974 | Ford | F-100 | RWD | Rear | 4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,450 Lb. Average Capacity |
| 1973 | Ford | F-100 | RWD | Rear | 4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,450 Lb. Average Capacity |
* 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.