ACDelco 12621644 Automatic Transmission Flex Plate

The ACDelco 12621644 Automatic Transmission Flex Plate is a GM Genuine Part designed to connect the engine crankshaft to the automatic transmission torque converter. This OE component is engineered to rigorous standards and backed by General Motors, ensuring precise fit and reliable performance.

Key Features:

• GM Genuine Part designed, engineered, and tested to rigorous standards
• Features 168 teeth ring gear for starter engagement
• Outer diameter of 14.13 inches with 11.5-inch inner diameter
• Includes spacer with 3.125-inch crank mounting center dimension
• Replaces GM part number 12617798
• Direct replacement for original equipment installed during production

This flexplate is also referred to as a driveplate or flywheel in automatic transmission applications. It mounts between the engine crankshaft and torque converter, transferring rotational power while allowing the torque converter to multiply engine torque. The ring gear teeth engage with the starter motor during engine cranking. ACDelco recommends using flywheel washer #12638261 during installation and applying thread locking compound to mounting bolts.