This rear leaf spring features a multi-leaf progressive design for the 1973–1991 Chevy/GMC 3/4 Ton Truck. The primary three leafs are functional with no additional load in the vehicle for excellent everyday ride quality. As moderate loads are applied, the secondary leafs engage. When the truck is fully loaded, the bottom overload engages for maximum hauling capacity. This setup allows the truck to maintain ride quality when unloaded without sacrificing payload.
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