Flexplates

A flexplate is a thin, circular metal plate that connects the engine’s crankshaft to the torque converter in vehicles equipped with automatic transmissions. It performs a similar role to a flywheel in manual systems but differs in design and function to suit the requirements of an automatic setup.

The automatic flexplate is typically lighter than a flywheel and includes perforations or cutouts to allow some flexing. This flexibility helps absorb minor alignment differences and rotational vibrations between the engine and transmission, contributing to smoother drivetrain operation.

When comparing a flexplate vs flywheel, the main differences are weight, thickness, and how they interact with the transmission. A flywheel is usually heavier and serves as a mounting surface for a clutch in manual transmissions, while a car flexplate primarily transfers torque and houses the starter ring gear.

Flexplates are essential to the operation of any automatic vehicle. Over time, they can develop cracks or wear, especially if subjected to improper installation, misalignment, or excessive torque. Regular inspection is recommended when servicing the transmission or starter components.