Has the Vibration Analysis - Road Testing table been completed?

Go to Step 2

Go to Vibration Analysis - Road Testing

Did you record frequency data from the J 38792-A during the Vibration Analysis - Road Testing procedure?

Go to Step 3

Go to Step 4

Based on the Vibration Analysis - Road Testing table, is the concern first order or sixth order driveline related?

Go to Step 5

Go to Step 4

Based on the Vibration Analysis - Road Testing table, is the concern a noise that is not felt?

Go to Vibration Diagnostic Aids

Go to Vibration Analysis - Road Testing

Inspect the following components for wear and/or damage:

Are any of the components listed worn or damaged?

Go to Step 6

Go to Step 7

Replace the worn, damaged or missing components. Refer to the appropriate procedure(s).

Did you complete the replacement?

Go to Step 20

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Attempt to duplicate the vibration in the stall. Refer to Vibration in Service-Stall Test (Non-Torque Sensitive)

Were you able to duplicate the vibration?

Go to Step 10

Go to Step 8

Perform the Vibration in Service-Stall Test (Torque Sensitive) .

Were you able to duplicate the vibration?

Go to Step 9

Go to Vibration Diagnostic Aids

1. Remove the propeller shaft. Refer to Propeller Shaft Replacement in Propeller Shaft.
2. Perform the Vibration in Service-Stall Test (Torque Sensitive) .

Is the vibration still present?

Go to Diagnostic Starting Point - Transfer Case in Transfer Case - NVG 900

Go to Diagnostic Starting Point - Rear Drive Axle in Rear Drive Axle

Was the vibration most evident under the rear of the transfer case?

Go to Step 11

Go to Step 15

Measure the runout of the transfer case output flange. Refer to Transfer Case Output Flange Runout Measurement .

Does the runout measurement require that the transfer case output flange be replaced?

Go to Step 12

Go to Step 13

1. Replace the transfer case output flange. Refer to Pinion Oil Seal Replacement in Transfer Case - NVG 900.
2. Perform the Vibration in Service-Stall Test (Non-Torque Sensitive) .

Is the vibration still present?

Go to Step 13

Go to Step 20

1. Inspect the engine mounts for the following:

•	Loose and/or missing fasteners

•	Improper alignment

•	Cracked, dry-rotted, and/or oil-soaked insulators

•	Twisted, broken, torn, and/or collapsed insulators

•	Bent, twisted, and/or deformed brackets

2. Replace powertrain mounts as necessary. Refer to the following procedures:

•	Engine and Transmission Mount Balancing - All Mounts in Engine Mechanical - 2.2L (L61)

•	Powertrain Mount Balance - Lower Mount in Engine Mechanical - 2.2L (L61)

•	Engine Mount Bracket Replacement in Engine Mechanical - 2.2L (L61)

•	Engine Mount Replacement in Engine Mechanical - 2.2L (L61)

•	Engine Mount Replacement in Engine Mechanical - 3.0L (L81)

•	Transmission Front Mount Replacement in Automatic Transaxle - AF33-5

•	Transmission Rear Mount Replacement in Automatic Transaxle - AF33-5

•	Transmission Rear Mount Bracket Replacement in Automatic Transaxle - AF33-5

•	Transmission Mount Replacement - Side in Automatic Transaxle - AF33-5

•	Transmission Front Mount Replacement in Automatic Transmission - VT25-E

•	Transmission Rear Mount Replacement in Automatic Transmission - VT25-E

•	Transmission Mount Replacement - Side in Automatic Transmission - VT25-E

•	Transmission Rear Mount Bracket Replacement in Automatic Transmission - VT25-E

Did you find and correct a condition?

Go to Step 14

Go to Step 15

Perform the Vibration in Service-Stall Test (Non-Torque Sensitive) .

Is the vibration still present?

Go to Step 15

Go to Step 20

Inspect the condition of the rear drive module (RDM) input flange for the following conditions:

Did the inspection indicate the RDM input flange required repair or replacement?

Go to Step 16

Go to Step 17

1. Repair or replace the pinion flange. Refer to Drive Pinion Flange/Yoke and/or Oil Seal Replacement in Rear Drive Axle.
2. Perform the Vibration in Service-Stall Test (Non-Torque Sensitive) .

Was the vibration reduced or eliminated?

Go to Step 20

Go to Step 17

1. Replace the propeller shaft. Refer to Propeller Shaft Replacement in Propeller Shaft.
2. Perform the Vibration in Service-Stall Test (Non-Torque Sensitive) .

Was the vibration reduced or eliminated?

Go to Step 20

Go to Step 18

Re-index the propeller shaft. Perform the following steps:

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Mark the position of the propeller shaft on both the transfer case output shaft flange and the RDM input flange.
3. Remove the propeller shaft.
4. Rotate the propeller shaft 180 degrees to both of the flanges.
5. Reinstall the propeller shaft.
6. Attempt to duplicate the vibration in the stall. Refer to the Vibration in Service-Stall Test (Non-Torque Sensitive) .

Was the vibration reduced or eliminated?

Go to Step 20

Go to Step 19

Return the propeller shaft to it's original position and balance the propeller shaft. Refer to Driveline System Balance Adjustment .

Were you able to balance the driveline system?

Go to Step 20

Go to Vibration Diagnostic Aids

1. Install or connect any components that were removed or disconnected during diagnosis.
2. Perform the Vibration Analysis - Road Testing table. Refer to Vibration Analysis - Road Testing .

Is the vibration still present?

Go to Step 3

System OK