Dorman 43-1855 Leaf Spring Assembly - Rear

Dorman 43-1855 Rear Leaf Spring Assembly

Dorman 43-1855 is a rear leaf spring assembly built for suspension restoration on select Ford Super Duty trucks. It supports vehicle weight and payload while helping restore ride height, stability, and passenger comfort on the rear suspension.

• Steel leaf spring construction for rear suspension service
• Standard replacement grade for direct repair work
• 3-leaf design with a 3-inch leaf width
• Load rate: 2700
• Black bushings included
• Rear axle application
• End 1 and End 2 use Berlin eye attachment type
• Length B: 33.188 in; pack thickness: 2.126 in; arch length: 6.875 in

Fitment and Application

Compatible with 2011-2016 Ford F-250 Super Duty, rear, with helper springs. Compatible with 2011-2016 Ford F-350 Super Duty, rear, single rear wheel (SRW). If you are replacing a worn rear leaf spring on a Ford F-250 Super Duty or Ford F-350 Super Duty, Dorman 43-1855 matches the listed rear suspension applications.

This part cross-references Dorman - OE Solutions 43-1855 for the same application.

How It Works

Leaf springs carry rear axle load and help control suspension movement under towing, hauling, and everyday driving. On Ford F-250 Super Duty and Ford F-350 Super Duty trucks, a worn spring can affect ride height, handling balance, and the way the rear suspension responds to payload changes. Dorman 43-1855 restores the rear spring assembly with the listed dimensions and attachment style for the specified applications.

Common Problems It Can Address

• Sagging rear ride height
• Reduced load support at the rear axle
• Uneven stance from a fatigued spring pack
• Excessive rear suspension movement under load
• Ride quality changes caused by worn leaf spring components

Installation Notes

Verify axle orientation, spring dimensions, and attachment style before installation. This rear leaf spring assembly is listed with bushings included and no mounting hardware included. Confirm the vehicle is a 2011-2016 Ford F-250 Super Duty with helper springs or a 2011-2016 Ford F-350 Super Duty SRW before ordering. Compare the existing spring pack thickness, arch length, and eye-to-eye measurements to the specifications shown for Dorman 43-1855.

Quality Assurance

Dorman OE Solutions parts are built as replacement components for service repairs where matching the original application matters. This leaf spring assembly is identified by part number 43-1855 and Spring Research Institute number 43-1855 for accurate cataloging and fitment verification.