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Dorman 43-678 Leaf Spring Assembly - Front
Dorman 43-678 Front Leaf Spring Assembly
Dorman 43-678 is a front leaf spring assembly for select Ford heavy-duty applications. It is built from steel with a 2-leaf design, black bushings, and an up-turned eye at both ends to match the listed suspension geometry. With a 3,486 lb average capacity and standard replacement grade construction, this leaf spring supports front suspension performance on Ford F-250 and Ford F-350 models.
Key Features
- Steel leaf spring assembly for front suspension service
- 2-leaf pack with full taper construction
- 3-inch leaf width and 1.939-inch pack thickness
- 2.9375-inch free arch / leaf spring arch length
- Black bushings included
- Up-turned eye attachment at both ends
- Standard replacement suspension grade
- Part number 43-678 for catalog and fitment lookup
Detailed Description
This Dorman leaf spring assembly is engineered for front suspension use on Ford trucks that require the specified high-arch, 2-leaf configuration. It is listed for 1980-1996 Ford F-250 front, 1980-1984 Ford F-350 front, 1985-1997 Ford F-350 front with independent front suspension, and 1997 Ford F-250 HD front. The assembly is a direct replacement style component for restoring ride height, load support, and suspension control in the front end. Dorman 43-678 is also referenced by part number 43-678 in catalog searches and service records.
This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.
What It Helps Fix
- Sagging or uneven front ride height
- Reduced load-carrying support in the front suspension
- Excessive front-end bounce or instability
- Worn or fatigued leaf spring packs
- Suspension noise related to deteriorated spring bushings
Installation Notes and Tips
Verify axle position, free arch, pack thickness, and attachment style before ordering. This assembly is for front applications only and does not require axle modification. Bushings are included, while mounting hardware is not listed as included. Confirm the vehicle’s suspension configuration against the fitment notes, especially for 1985-1997 Ford F-350 models with independent front suspension.
Quality Assurance
Dorman supplies this leaf spring as a standard replacement suspension component built to match the listed application requirements. The part number 43-678 is tied to the specified dimensions, load rate, and fitment data for Ford F-250 and Ford F-350 front suspension service.
| Brand | Dorman |
| Part Number | 43-678 |
| Material | Acero |
| Material | Steel |
| Bushing Color | Black |
| Bushing Color | Negro |
| Bushing Color | Noir |
| Color | Black |
| Color | Negro |
| Color | Noir |
| Load Rate | 3486 |
| Suspension Grade Type | Reemplazo estándar |
| Suspension Grade Type | Standard |
| Leaf Quantity | 2 |
| Leaf Width | 3 |
| Axle Orientation | Avant |
| Axle Orientation | Delantero |
| Axle Orientation | Front |
| 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 | 23.875 |
| Length Axis 2 | 23.875 |
| Pack Thickness | 1.939 |
| Leaf Spring Arch Length | 2.938 |
| Spring Research Institute Number | 43-678 |
This part fits 36 vehicles. Search below:
| Year | Make | Model | Drive Type | Position | Notes |
|---|---|---|---|---|---|
| 1997 | Ford | F-250 HD | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1997 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch; w/Independent Front Suspension |
| 1996 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1996 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch; w/Independent Front Suspension |
| 1995 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1995 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch; w/Independent Front Suspension |
| 1994 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1994 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch; w/Independent Front Suspension |
| 1993 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1993 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch; w/Independent Front Suspension |
| 1992 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1992 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch; w/Independent Front Suspension |
| 1991 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1991 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch; w/Independent Front Suspension |
| 1990 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1990 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch; w/Independent Front Suspension |
| 1989 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1989 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch; w/Independent Front Suspension |
| 1988 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1988 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch; w/Independent Front Suspension |
| 1987 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1987 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch; w/Independent Front Suspension |
| 1986 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1986 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch; w/Independent Front Suspension |
| 1985 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1985 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch; w/Independent Front Suspension |
| 1984 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1984 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1983 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1983 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1982 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1982 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1981 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1981 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1980 | Ford | F-250 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
| 1980 | Ford | F-350 | 4WD | Front | 2 Leaf / 1 Pad; Full Taper; 2.9375 In. Free Arch; 1.9375 In. Pack Thickness; 3,486 Lb. Average Capacity; High Arch |
* 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.