Dorman 43-1579 Rear Leaf Helper Spring OE Replacement

The Dorman 43-1579 is a rear leaf helper spring engineered as a direct OE replacement for select Ford F-350 Super Duty trucks equipped with dual rear wheels (DRW). Designed under Dorman's OE Solutions line, this helper spring restores proper suspension performance after the original has failed due to rust, fatigue, or wear.

Key Features:

• Direct replacement — engineered to match the fit and function of the factory original spring
• 1-leaf, full taper design — replicates the OEM configuration for seamless installation
• 1/2 in. leaf thickness — matches original spring geometry and stacking height
• 450 lb. average load capacity — restores the rear suspension's ability to support payload
• Dual rear wheel (DRW) compatible — specifically designed for DRW-equipped Ford Super Duty trucks
• Durable construction — made from quality materials engineered for long service life
• Backed by Dorman's expertise — supported by over 100 years of automotive aftermarket experience

Cross-reference OEM part numbers: 5C3Z-5588-DA, 5C34-5588-DA. This leaf helper spring is sold individually. Left = Driver Side, Right = Passenger Side.