Removal Procedure
- Remove the transmission. Refer to Transmission Replacement in Automatic Transmission - 4L60-E.
- Remove the engine flywheel bolts.
- Remove the engine flywheel.
- Clean and inspect the engine flywheel. Refer to Engine Flywheel Cleaning and Inspection .
Important: Note the position and direction of the engine flywheel before removal.
Installation Procedure
- Install the engine flywheel to the crankshaft.
- Apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the threads of the flywheel bolts.
- Install the engine flywheel bolts.
- Tighten the bolts a first pass in sequence to 20 N·m (15 lb ft).
- Tighten the bolts a second pass in sequence to 50 N·m (37 lb ft).
- Tighten the bolts a final pass in sequence to 100 N·m (74 lb ft).
- Install the transmission. Refer to Transmission Replacement in Automatic Transmission - 4L60-E.
Important: The flywheel does not use a locating pin for alignment and will not initially seat against the crankshaft flange, but will be pulled onto the crankshaft by the engine flywheel bolts. This procedure requires a three stage tightening process.
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.
Tighten
