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Dorman 43-1289HD Leaf Spring Assembly - Rear
Dorman 43-1289HD Leaf Spring Assembly
Dorman 43-1289HD is a heavy-duty rear leaf spring assembly built from steel for vehicles that carry payload and need stable suspension performance. With a 10-leaf design, 3-inch leaf width, and 8,000 load rate, it is built for demanding rear suspension service on applications such as Chevrolet Silverado and GMC Sierra trucks where consistent ride support matters.
Key Features
- Steel construction for strength and durability
- Heavy-duty suspension grade for rear axle use
- 10-leaf pack with 3-inch leaf width
- 8,000 load rate for payload support
- Up-turned eye ends with bushings included
- Black finish and black bushings
- Rear axle orientation
Product Details
This Dorman leaf spring assembly, part number 43-1289HD, is engineered to restore rear suspension support when the original spring has lost arch, sagged under load, or no longer controls axle movement properly. The steel leaf pack measures 30.75 inches in length B, with a 5.322 pack thickness and 5.125 leaf spring arch length, helping maintain the vehicle’s ride height and load-carrying balance. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.
What It Helps Address
- Rear-end sag under cargo or towing load
- Uneven ride height from worn leaf springs
- Excessive rear suspension movement
- Reduced stability over bumps and rough roads
- Loss of proper axle support in heavy-duty use
Installation Notes and Tips
Verify axle orientation, leaf width, end attachment type, and bushing configuration before ordering. This assembly includes bushings and does not require axle modification. Mounting hardware is not included. For best results, inspect related suspension components such as shackles, U-bolts, and spring hangers during service. Confirm the application against the vehicle’s rear suspension layout before installation on Chevrolet Silverado or GMC Sierra models.
Quality Assurance
Dorman OE Solutions parts are built to match the needs of replacement suspension service with application-focused dimensions and materials. Part number 43-1289HD is identified for rear leaf spring replacement use and is supported by Dorman’s OE Solutions product line.
| Brand | Dorman |
|---|---|
| Part Number | 43-1289HD |
| Material | Acero |
| Material | Steel |
| Bushing Color | Black |
| Bushing Color | Negro |
| Bushing Color | Noir |
| Color | Black |
| Color | Negro |
| Color | Noir |
| Load Rate | 8000 |
| Suspension Grade Type | Heavy duty |
| Suspension Grade Type | Para uso pesado |
| Leaf Quantity | 10 |
| 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 | 25 |
| Length Axis 2 | 25 |
| Pack Thickness | 5.322 |
| Leaf Spring Arch Length | 5.125 |
| Spring Research Institute Number | 43-1289hd |
This part fits 0 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|
* 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.