Flexplate/Torque Converter Vibration Test

ALLISON AUTOMATIC TRANSMISSION

Flexplate/Torque Converter Vibration Test (6.6L)
To determine and correct a torque converter vibration, use the following general procedure to achieve the best possible torque converter-to-flywheel balance.

1. Caution:
Refer to Battery Disconnect Caution in Service Precautions.

Disconnect the battery.

2. Raise the vehicle halfway. Refer to Vehicle Lifting.
3. Remove the starter motor bolts and position the starter motor aside.
4. Repeat this procedure until you obtain the best possible balance.
^ Unless already removed, remove the starter motor bolts and position the starter motor aside.





^ Remove the torque converter bolts.
^ Rotate the torque converter one bolt position.

^ Notice:
Refer to Fastener Notice in Service Precautions.

Install the torque converter bolts.

^ Tighten the bolts to 60 Nm (44 ft. lbs.).
^ Install the starter motor and starter motor bolts.

^ Caution:
Refer to Battery Disconnect Caution in Service Precautions.

Connect the battery.

^ Start the vehicle and test for vibration again.