1. If equipped with a automatic transmission, remove the transmission. Refer to Transmission Replacement for the 4L80-E transmission, or Transmission Replacement for the Allison transmission.
2. Remove the engine flywheel bolts.
3. Remove the engine flywheel.



4. If equipped with a manual transmission, remove the clutch assembly. Refer to Clutch Assembly Replacement .
5. Remove the engine flywheel bolts.
6. Remove the engine flywheel.
7. Clean and inspect the engine flywheel. Refer to Engine Flywheel Cleaning and Inspection .

Important: Make sure the flywheel is installed correctly. "Engine Side" is stamped on the flywheel to aid with installation.

1. If equipped with a manual transmission, Install the engine flywheel.



2. If equipped with a automatic transmission, install the engine flywheel.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

3. Install the engine flywheel bolts.

Tighten

1. Tighten the bolts a first pass to 40 N·m (30 lb ft).
2. Tighten the bolts a second pass to 80 N·m (59 lb ft).
3. Tighten the bolts a final pass to 100 N·m (74 lb ft).
4. If equipped with a manual transmission, install the clutch assembly. Refer to Clutch Assembly Replacement .
5. If equipped with a automatic transmission, install the transmission. Refer to Transmission Replacement for the 4L80-E transmission, or Transmission Replacement for the Allison transmission.