Automatic Transmission Flex Plate – GM (12661237)

Automatic Transmission Flex Plate is a containment or structural component matched to a specific casting and bolt pattern. Parts that look interchangeable often differ in offset or internal volume.

Replace the Flex Plate when the casting is cracked at a mounting point, when a mating flange is no longer flat, or when the original has corroded through. Check the surface it seals against before fitting a replacement.

Ordering reference for the Flex Plate is part number 12661237, categorised under Transmission Assemblies. Match that number against the component you are removing before you order.

Genuine GM part for the Flex Plate. Where the manufacturer has superseded a number, the current reference is the one that ships.