In listed Chrysler units, the root cause of Low/Reverse oil feed leakage is piston retainer distortion and gasket material relaxing around the clutch feed hole. This prevents a positive seal around the oil feed hole on the piston retainer. The Sonnax steel shim will not distort. The rubber grommet provides positive sealing at the passage. A Chrysler production parts change included a redesigned piston retainer and gasket. Sonnax Low/Reverse piston retainer oil feed seal kit 92106-01K can be used to replace early-style gaskets. For six-speed applications with universal/late-style gaskets, use 92106-03K.