ACDelco 8678083 GM Original Equipment Automatic Transmission Reaction Sun Gear This original equipment gear will provide the same performance, durability, and service life you expect from General Motors. ACDelco GM Original Equipment Automatic Transmission Reaction Sun Gear is a GM-recommended replacement component for one or more of the following vehicle systems: automatic transmission/transaxle, and/or manual drivetrain and axles. 4L60E Reaction Sun Gear, Rear - GM Transmission 700R4 GM-recommended replacement part for your GM vehicle’s original factory component GM Genuine Parts Automatic Transmission Reaction Sun Gears are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles Genuine ACDelco Automatic Transmission Reaction Sun Gear 24241247 ACDelco GM Original Equipment Automatic Transmission Reaction Sun Gear is a GM-recommended replacement component for one or more of the following vehicle systems: automatic transmission/transaxle, and/or manual drivetrain and axles