Removal & Installation
The flywheel on cars with manual transaxles serves as the forward clutch engagement surface. It also serves as the ring gear with which the starter pinion engages to crank the engine. The most common reasons to replace the flywheel are:
On cars with automatic transaxles, the torque converter actually forms part of the flywheel. It is bolted to a thin driveplate which, in turn, is bolted to the crankshaft. The driveplate also serves as the ring gear with which the starter pinion engages in engine cranking. The driveplate occasionally cracks; the teeth on the ring gear may also break, especially if the starter is often engaged while the pinion is still spinning. The torque converter and driveplate must be separated, and the converter and transaxle are be removed together.