66-72 Ford F100 Rear Sping Bushings 4WD

The 66-72 Ford F100 Rear Spring Bushings 4WD from PROTHANE are engineered to restore suspension geometry and eliminate worn-out factory rubber components in classic Ford trucks. Over decades of use, original elastomer bushings compress, crack, and allow excessive movement between the frame and leaf springs, compromising handling, alignment, and ride quality. These polyurethane replacements are designed specifically for four-wheel-drive F-Series models, where suspension articulation demands are highest during off-road work or towing.

PROTHANE's polyurethane formulation provides superior durability compared to original rubber, resisting UV degradation, ozone cracking, and compression set. The bushings feature a steel core with cadmium-plated hardware that resists corrosion in wet climates and salt-exposed environments common to truck owners. Polyurethane's higher durometer rating creates a stiffer bushing that reduces compliance in the suspension chain, translating to more precise spring articulation, better load distribution across the leaf pack, and improved axle control during acceleration or braking events. The black polyurethane color and industrial finish blend seamlessly with underbody components while maintaining structural integrity over extended service intervals.

Restorers, off-road enthusiasts, and daily-driver owners of 1966–1972 Ford F100 4WD trucks benefit most from this upgrade, especially those planning suspension rebuilds or addressing clunking noises from the rear axle area. Installation requires basic hand tools and fits directly into factory mounting locations without modification. This kit contains all bushings needed for a complete rear spring assembly overhaul, making it an economical choice for comprehensive suspension renewal on vehicles that see heavy use or sit for long periods before recommissioning.