Replacing the OE sleeve in listed units is recommended on all rebuilds due to the inherent movement of the OE sleeve when heated. Removing and replacing the OE sleeve with Sonnax K2 clutch seal ring sleeve kit 15759-01K re-establishes sufficient oil flow to the K2 clutch. For improved retention, the Sonnax sleeve features an increased press fit and an included anti-rotational pin to ensure against repeat failure.