Heat distorts a steel plate long before it discolors, which is why a pack that looks reusable often is not.8L90 4-5-6-7-8-Reverse Clutch Piston STEEL. The set covers the positions the pack uses, sized to the original specification.Parallel faces are what keep the apply load off the edges of the discs. Shipping weight is 1 lb.The parts list below is exactly what ships. Compare it against your teardown before ordering.REMCO has supplied automatic transmission parts since 1991, and every order ships with its part listing so the receiving technician can check what arrived against what was ordered. Transmission Hard Part for 8L90 - replacement component designed for proper fit and function Designed to support proper torque transfer, alignment and internal support during an internal repair Package Includes: one transmission hard part as described, supplied loose for an internal repair Hardened steel machined to the original dimensions - designed for dependable service in the intended application. Ships at 1.00 lb, 7x7x2 in Intended for builders replacing worn internal components. Inspect the mating surface for scoring and measure end play after assembly