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Dorman 43-781HD Leaf Spring Assembly - RearOE Quality 60-Day Returns
Part #: 43-781HD

Dorman 43-781HD Leaf Spring Assembly - Rear

Rear
50 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Ford and Mazda, B2300, B2500, B3000, B4000, and Ranger
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Durable Leaf Spring Assembly for Ford and Mazda Trucks

The Dorman 43-781HD leaf spring assembly is engineered to provide reliable rear suspension support for select Ford and Mazda truck models. Designed with heavy-duty applications in mind, this steel leaf spring assembly offers consistent load handling and improved vehicle stability.

  • Constructed from high-quality steel with a black finish for corrosion resistance
  • Heavy-duty suspension grade with a 1750 lb load rate capacity
  • Includes five leaves with a 2.5-inch width for balanced support
  • Rear axle orientation designed specifically for Ford Ranger, B2300, B2500, B3000, and B4000 models
  • Comes with black bushings included for enhanced durability and noise reduction
  • No axle modification or helper spring required for installation
  • Leaf spring arch length of 5.5 inches and pack thickness of 1.786 inches

Product Details and Specifications

The Dorman 43-781HD leaf spring assembly is made from durable steel, finished in black to resist rust and wear. This heavy-duty suspension component is designed to handle a load rate of 1750 pounds, making it suitable for trucks used in demanding conditions. The assembly features five leaves, each 2.5 inches wide, providing a balanced and stable ride. It is intended for rear axle installation and includes black bushings to reduce vibration and improve longevity. The spring pack thickness measures 1.786 inches, with an arch length of 5.5 inches, ensuring proper fit and function without requiring axle modifications or additional helper springs.

Compatible Vehicles and Applications

  • Ford Ranger rear suspension replacement
  • Mazda B2300 leaf spring upgrade
  • Mazda B2500 rear leaf spring repair
  • Mazda B3000 heavy-duty suspension support
  • Mazda B4000 leaf spring assembly replacement

Installation Notes and Tips

Installation of the Dorman 43-781HD leaf spring assembly does not require axle modifications or additional helper springs. Ensure the vehicle is safely supported and the rear axle is properly aligned before removing the old leaf spring. Since mounting hardware is not included, use existing or OEM-grade hardware for secure installation. Verify bushing condition and replace if necessary to maintain suspension performance.

Quality Assurance and Warranty

Dorman manufactures this leaf spring assembly to meet or exceed OEM standards for durability and performance. The steel construction and included bushings contribute to long service life under heavy-duty conditions. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in materials and workmanship.

BrandDorman
Part Number43-781HD
MaterialAcero
MaterialSteel
Bushing ColorBlack
Bushing ColorNegro
Bushing ColorNoir
ColorBlack
ColorNegro
ColorNoir
Load Rate1750
Suspension Grade TypeHeavy duty
Suspension Grade TypePara uso pesado
Leaf Quantity5
Leaf Width2.5
Axle OrientationArrière
Axle OrientationRear
Axle OrientationTrasero
Helper SpringNo
Helper SpringNon
Axle Modification NeededNo
Axle Modification NeededNon
Bushings IncludedOui
Bushings IncludedSí
Bushings IncludedYes
Mounting Hardware IncludedNo
Mounting Hardware IncludedNon
Length Axis 125.625
Length Axis 225.625
Pack Thickness1.786
Leaf Spring Arch Length5.5
Spring Research Institute Number43-781hd

This part fits 50 vehicles. Search below:

YearMakeModelPositionNotes
2003FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
2003MazdaB2300Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
2003MazdaB3000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
2003MazdaB4000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
2002FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
2002MazdaB2300Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
2002MazdaB3000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
2002MazdaB4000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
2001FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
2001MazdaB2300Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
2001MazdaB2500Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
2001MazdaB3000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
2001MazdaB4000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
2000FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
2000MazdaB2500Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
2000MazdaB3000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
2000MazdaB4000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1999FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1999MazdaB2500Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1999MazdaB3000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1999MazdaB4000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1998FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1998MazdaB2500Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1998MazdaB3000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1998MazdaB4000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1997FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1997MazdaB2300Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1997MazdaB3000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1997MazdaB4000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1996FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1996MazdaB2300Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1996MazdaB3000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1996MazdaB4000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1995FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1995MazdaB2300Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1995MazdaB3000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1995MazdaB4000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1994FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1994MazdaB2300Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1994MazdaB3000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1994MazdaB4000Rear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1993FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1992FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1991FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1990FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1989FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1988FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1987FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1986FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design
1983FordRangerRear4 Leaf / 1 Leaf = 5 Leaf Spring; 1.875 In. Pack Thickness; 1,750 Lb. Average Capacity; Heavy Duty Aftermarket Design; To 1/83

* 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:

043-0781-00HD43-781HD43-781HDDAY43-863HD

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

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