Toyota 13405-31080 Flywheel Sub-Assembly

Manual transmission-equipped models use flywheels, while "Driveplate" refers to the automatic transmission version of this part. To begin removal, disconnect the cable from the negative terminal of the battery. For vehicles with manual transmission, remove the pressure plate and clutch disc. Make alignment marks on the flywheel/driveplate and crankshaft to ensure correct alignment during reinstallation. Remove the bolts securing the flywheel/driveplate to the crankshaft, using a screwdriver in the ring gear teeth to hold it if the crankshaft turns. Carefully remove the flywheel/driveplate from the crankshaft, supporting it while removing the last bolt, noting that automatic transmission-equipped vehicles have spacers on both sides of the driveplate. For installation, clean the flywheel/driveplate to remove grease and oil, inspecting the surface for cracks, rivet grooves, burned areas, and score marks, with light scoring removable using emery cloth. Check for cracked or broken ring gear teeth and lay the flywheel on a flat surface to check for warpage with a straightedge. Clean and inspect the mating surfaces of the flywheel/driveplate and crankshaft, replacing the crankshaft rear seal if it is leaking before reinstalling. Position the flywheel/driveplate against the crankshaft, aligning the marks made during removal, and note that some engines have an alignment dowel or staggered bolt holes for correct installation. Apply thread-locking compound to the bolt threads before installation, wedge a screwdriver in the ring gear teeth to prevent turning, and tighten the bolts in a criss-cross pattern, working up to the final torque in three or four steps. The remainder of the installation follows the reverse of the removal procedure.