Raise the vehicle and support it securely on jack stands, ensuring that if equipped with Automatic Ride Control (ARC), the air suspension switch is turned to the OFF position before raising to prevent damage to the system components. For vehicles with manual transmission, remove the pressure plate and clutch disc. Apply alignment marks on the flywheel/drive plate and crankshaft to ensure correct alignment during reinstallation. Remove the bolts securing the flywheel/drive plate to the crankshaft, supporting the heavy flywheel during removal; if the crankshaft turns, wedge a screwdriver through the starter opening to jam the flywheel, noting that 1997 and later models have eight flywheel bolts while earlier models have six. Carefully remove the flywheel/drive plate from the crankshaft, supporting it while removing the last bolt. Clean the flywheel 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 and broken ring gear teeth, laying the flywheel on a flat surface to check for warpage with a straightedge. Clean and inspect the mating surfaces of the flywheel/drive plate and crankshaft, replacing the crankshaft rear seal if leaking before reinstalling. Position the flywheel/drive plate against the crankshaft, aligning the marks made during removal, and noting that some engines have an alignment dowel or staggered bolt holes for correct installation. Apply thread locking compound to the bolt threads before tightening, using a screwdriver through the starter motor opening to prevent the flywheel/drive plate from turning as the bolts are torqued. The remainder of the installation follows the reverse of the removal procedure.