Fits General Motors 4L80E, 4L85E, 1991-2009
Includes New Boost Valve assembly, High Pressure Relief assembly, Stronger better design Solenoid filter, Case to Center Support seals, 4th clutch strong bolt and other items which improve overall drivability and durability.
Addresses High pressure parts breakage; direct clutch burn up; soft 2-3 slide-bang 1-2; low pressure due to solenoid filter breakup. Missing shifts with no diagnostic codes. Convenient drop in valves, No special tooling or machining necessary!