Flywheel Installation Checklist

Always consult a service manual for proper "remove and replace" instructions as well as the correct torque and tightening sequence for the flywheel bolts.

Make sure the replacement matches the original flywheel (especially the balancing weight if used).

NAM flywheels are not for racing or heavy duty off-road use.

An out of balance engine or torque converter will cause failure of the flywheel.

A worn front pump bushing will cause excessive stress on the flywheel. Replace the front pump bushing. Also replace the front pump seal, extension housing bushing and seal to provide your customer with a professional, leak free repair. You don't want to pull the transmission again do you?

Worn engine and/or transmission mounts will put excessive strain on the flywheel.

Excessive clearance, due to engine crankshaft endplay (common in older, high mileage vehicles) and/or installing a rebuilt torque converter or front pump, will cause the flywheel to fail. Use flywheel shims to remedy this vibration-inducing, metal stressing condition.

Whenever the flywheel is serviced, install new bolts in the proper sequence and to correct torque specifications.

A starter drive with bad teeth will cause rapid wear or failure of the teeth on the flywheel.

Many General Motors vehicles utilize shims to obtain the proper clearance between the teeth on the flywheel and the teeth on the starter drive (see illustration). Make sure there is proper clearance.

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