Starter ring gear

Starter ring gears are attached to either the flywheel or the flexplate of an engine.

The starter ring gear is most commonly made by forming a length of square or rectangular steel bar into a circle and welding the ends together.

This ring is then machined to create flat surfaces of the required inner and outer diameters.

[1] In cars with a manual transmission, the starter ring gear is fitted to the outer diameter of the flywheel.

[3] In cars with an automatic transmission, the starter ring gear is usually welded to the outside of the flexplate.