Tool, Installation, Tool for 34838-01K, TH-400, 4L80-E, GM

Wear at the direct clutch drum bore from the center support piston rings allows 3rd and reverse clutch apply oil to exhaust. This oil leakage can result in direct clutch failure, delayed or no 3rd/reverse, slips in 3rd or no 4th gear, and the various slip codes noted above. Often the direct drum bore is worn beyond the ability for new seals to restore the hydraulic integrity. The Sonnax sleeve 34838-01K allows the salvage of worn direct clutch drum bores, and restores the hydraulic integrity at the center support piston ring locations. Machining of the direct drum is necessary and use of the Sonnax sleeve installation tool is recommended.

Features & Benefits

Salvages direct clutch drum.