Transmission Servo & Accumulator Piston Kit

The General Motors 8642079 is a direct replacement transmission servo and accumulator piston kit, often referred to as a "Corvette Upgrade." This kit includes all necessary components for installation: the piston, housing, two O-rings, and two sealing rings. It is identified as a #093 Type casting and does not feature accumulator pistons. This part is designed for a wide range of General Motors vehicles, specifically fitting automatic transmissions such as the THM700-R4 (4L60, MD8) from 1982-1993, the 4L60-E from 1994-2004, and the 4L65-E in 2005. It is compatible with Chevrolet Corvette models from 1982 to 2005. The "Vehicle Fitment" table details compatibility across numerous GM models, including specific years, engines, and body styles. For example, it fits 1994-1996 Buick Roadmaster 8 Cyl 5.7L (4 DOOR, LIMITED, LIMITED SEDAN, STATION WAGON) and 1984-2005 Chevrolet Corvette 8 Cyl 5.7L, 8 Cyl 6.0L (2 DOOR, CONVERTIBLE, NOTCHBACK). Always consult the complete fitment chart to ensure proper application for your specific vehicle. This genuine GM part is guaranteed by GM's factory warranty. It is important to note that some sources indicate this part may be discontinued, so availability should be confirmed.