Seller notes

6T70 (Gen. 1), 6T70 (Gen. 2), 6T75 (Gen. 1), 6T75 (Gen. 2) 3-5-R Drum Saver Kit Part No. 124555KThe 3-5-R waved plate in GM Gen. 1 and 2 6T70, 6T75 units commonly fails and breaks into pieces, resulting in code P0776, harsh and flare shifts or complete loss of 3-5-R. While the OEM attempted to prevent this problem by issuing an updated (shot-peened) plate, it continues to fail in some units, damaging the drum housing splines. The teeth on the OE plate are high-stress points that cannot stand up ...

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