The first step towards engine Flywheel replacement involves removing the transmission based on specifications that match between the 4l60-e/4l65-e/4l70-e, 4l50/4l80/4l90, or allison transmission model requirements. Install the Flywheel holding tool (J 44643) before beginning Flywheel security. Workers handling the component should use gloves due to the presence of dangerous sharp edges. The procedure requires you to remove all Flywheel bolts before eliminating both Flywheel washer and Flywheel from the system. The tapered section on the Flywheel teeth should face toward the
Starter before installing the Flywheel washer which has its bevelled side facing the engine. Apply caution during installation because the bolts come with a preinstalled molybdenum disulfide coating to provide lubrication yet no additional lubricant should be added to these bolts because this facing can influence torque and clamp load which may damage your engine. The new Flywheel bolts need installation according to this order: apply torque to 79 nm (58 lb ft) during the first pass followed by a second pass achieving a 60-degree angle with the angle meter (J 45059) and then complete the third pass by extending 60 more degrees with the same angle meter (J 45059). Reinstall the transmission per model specifications after you have removed the Flywheel holding tool (J 44643) from the system.