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Vibration Analysis - Driveline

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Vibration Analysis - Driveline

Step Action Yes No
1 Has the Vibration Analysis - Road Testing table been completed? Go to Step 2  Go to Vibration Analysis - Road Testing 
2 Did you record frequency data from the J 38792-A  during the Vibration Analysis - Road Testing procedure? See Special Tools . Go to Step 3  Go to Step 4 
3 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 
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 
5 Inspect the following components for wear and/or damage:
  • Inspect the propeller shafts for dents, damage, missing weights, and undercoating.
  • Inspect the propeller shaft constant velocity joints for wear and/or damage.
  • Inspect the propeller shaft for damaged or worn universal joints.
  • Inspect the center bearing for damage, worn rubber, and/or looseness.
  • Inspect the rear differential carrier assembly mounts for damaged or worn rubber, and/or looseness.

Are any of the components listed worn or damaged?		 Go to Step 6  Go to Step 7 
6 Replace the worn, damaged or missing components. Refer to the appropriate procedure(s).
Did you complete the replacement?		 Go to Step 20  -
7 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 
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 
9
  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
10 Was the vibration most evident under the rear of the transfer case? Go to Step 11  Go to Step 15 
11 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 
12
  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 
13
  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:
Did you find and correct a condition?		 Go to Step 14  Go to Step 15 
14 Perform the Vibration in Service-Stall Test (Non-Torque Sensitive) .
Is the vibration still present?		 Go to Step 15  Go to Step 20 
15 Inspect the condition of the rear drive module (RDM) input flange for the following conditions:
  • Missing and/or broken fasteners
  • Looseness at the RDM input flange
  • Bent RDM input flange
  • Damaged RDM input flange

Did the inspection indicate the RDM input flange required repair or replacement?		 Go to Step 16  Go to Step 17 
16
  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 
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 
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 
19 Return the propeller shaft to it's original position and balance the propeller shaft. Refer to Driveline System Balance Adjustment (Using EVA)  or Driveline System Balance Adjustment (Without EVA) .
Were you able to balance the driveline system?		 Go to Step 20  Go to Vibration Diagnostic Aids 
20
  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
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