Tools Required

1. Remove the transmission from the cylinder block. Refer to Transmission Removal in Manual Transmission -- M59 or Transmission Replacement in Automatic Transmission -- 4 Speed.



2. Remove the clutch from the flywheel (2) on manual transmission equipped vehicles. Refer to Clutch Assembly Replacement in Clutch.
3. Inspect the ring gear. Replace the flywheel (2) if the ring gear is damaged, cracked or worn.
4. Inspect the surface which is contacting the clutch disc on manual transmission equipped vehicles. Replace the flywheel if the surface is damaged or excessively worn.
5. Use a J 8001 with a J 26900-13 in order to measure the flywheel (2) for face runout. Replace the flywheel if the runout exceeds 0.2 mm (0.0078 in).
6. Mark the flywheel-to-engine position.
7. Remove the six flywheel retaining bolts.
8. Remove the flywheel from the crankshaft.
9. Remove the nylon clutch pilot bushing from the crankshaft (1).
10. Clean the grease and dirt from the flywheel (2) outer surfaces using a suitable solvent.

1. Install the flywheel to the crankshaft. Align the flywheel-to-engine marks.

Notice: Apply the proper amount of the sealant to the fastener when assembling this component. Excessive use of the sealant can prohibit the component from being assembled properly or allow the fastener to loosen. A component or fastener that is not assembled properly can loosen or fall off leading to extensive engine damage.

2. Apply GM P/N 12345493, or the equivalent, to the flywheel retaining bolt threads.

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 flywheel retaining bolts to the flywheel.

Tighten
Tighten the flywheel retaining bolts to 78 N·m (58 lb ft).

4. Install the clutch to the flywheel on manual transmission equipped vehicles. Refer to Clutch Assembly Replacement in Clutch.
5. Install the transmission to the engine. Refer to Transmission Installation in Manual Transmission -- M59 or Transmission Replacement in Automatic Transmission -- 4 Speed.