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Dorman 43-721HD Leaf Spring Assembly - Rear
Durable Leaf Spring Assembly for Ford F-350 Rear Suspension
The Dorman 43-721HD leaf spring assembly is engineered to provide reliable heavy-duty suspension support for Ford F-350 trucks. Designed with high-quality steel and a robust 12-leaf configuration, this rear axle leaf spring assembly offers consistent load handling and durability for demanding applications.
- Constructed from durable steel material for strength and longevity
- Heavy-duty suspension grade with a 4500 lb load rate capacity
- 12 leaves with 2.25-inch width for enhanced support and stability
- Black finish with black bushings included for corrosion resistance
- Designed for rear axle orientation with no axle modification required
- Includes bushings but does not include mounting hardware
- Leaf spring arch length of 4.75 inches and pack thickness of 4.812 inches
Technical Details and Specifications
The Dorman 43-721HD leaf spring assembly is specifically designed for the rear suspension of Ford F-350 trucks. It features a 12-leaf pack made from high-grade steel, providing a load rate of 4500 pounds suitable for heavy-duty use. The assembly comes with black bushings pre-installed, ensuring smooth operation and reducing wear. With a leaf width of 2.25 inches and an arch length of 4.75 inches, this leaf spring maintains proper ride height and suspension performance without requiring any axle modifications. The black finish helps protect against rust and environmental damage, extending the service life of the component.
Applications and Problem Solving
- Restores rear suspension support for Ford F-350 trucks under heavy loads
- Replaces worn or broken leaf springs causing sagging or uneven ride height
- Improves vehicle stability and load handling for towing and hauling
- Addresses suspension noise or bushing wear with included bushings
- Maintains proper axle alignment and suspension geometry without modifications
Installation Notes and Tips
Installation of the Dorman 43-721HD leaf spring assembly requires standard suspension tools and mechanical knowledge. Since mounting hardware is not included, ensure you have the correct bolts and U-bolts for your Ford F-350 model year. No axle modifications are necessary, simplifying the replacement process. It is recommended to inspect related suspension components such as shackles and bushings during installation to ensure optimal performance.
Quality Assurance and Warranty
Dorman manufactures this leaf spring assembly to meet or exceed OEM specifications for durability and performance. The product includes bushings to reduce maintenance needs and improve ride quality. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in materials and workmanship. Verify warranty terms with the supplier or manufacturer documentation.
| Brand | Dorman |
|---|---|
| Part Number | 43-721HD |
| Material | Acero |
| Material | Steel |
| Bushing Color | Black |
| Bushing Color | Negro |
| Bushing Color | Noir |
| Color | Black |
| Color | Negro |
| Color | Noir |
| Load Rate | 4500 |
| Suspension Grade Type | Heavy duty |
| Suspension Grade Type | Para uso pesado |
| Leaf Quantity | 12 |
| Leaf Width | 2.25 |
| 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 | 26 |
| Length Axis 2 | 26 |
| Pack Thickness | 4.812 |
| Leaf Spring Arch Length | 4.75 |
| Spring Research Institute Number | 43-721hd |
This part fits 18 vehicles. Search below:
| Year | Make | Model | Body Type | Position | Notes |
|---|---|---|---|---|---|
| 1997 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1996 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1995 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1994 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1993 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1992 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1991 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1990 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1989 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1988 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1987 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1986 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1985 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1984 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1983 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1982 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1981 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
| 1980 | Ford | F-350 | Cab & Chassis | Rear | 12 Leaf; 4.8125 In. Pack Thickness; 4,500 Lb. Average Capacity; w/Dual Rear Wheels (DRW); Heavy Duty Aftermarket Design |
* 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.