Inspect the center bearing.

Is the bearing worn?

Go to Step 2

Go to Step 3

Replace the center bearing. Refer to Propeller Shaft Center Support Bearing Replacement .

Is roughness or vibration still evident?

Go to Step 3

System OK

Inspect the hanger.

Is the hanger worn?

Go to Step 4

Go to Step 5

Replace the hanger.

Is roughness or vibration still evident?

Go to Step 5

System OK

Inspect the universal joints.

Do the universal joints require lubrication?

Go to Step 6

Go to Step 7

Lubricate the universal joints. Refer to Fluid and Lubricant Recommendations in Maintenance and Lubrication.

Is roughness or vibration still evident?

Go to Step 7

System OK

Inspect the universal joints.

Are the universal joints worn?

Go to Step 8

Go to Step 9

Replace the universal joints. Refer to Universal Joint Replacement .

Is roughness or vibration still evident?

Go to Step 9

System OK

Inspect the flange bolts.

Are the bolts loose?

Go to Step 10

Go to Step 11

Tighten the flange bolts to specification. Refer to Fastener Tightening Specifications .

Is roughness or vibration still evident?

Go to Step 11

System OK

Inspect the tires.

Are the tires worn?

Go to Step 12

Go to Step 13

Replace the tires as necessary. Refer to Tire Mounting and Dismounting in Tires and Wheels.

Is roughness or vibration still evident?

Go to Step 13

System OK

Inspect the companion flange.

Are there burrs or gouges on the companion flange?

Go to Step 14

Go to Step 15

1. Inspect the snap ring locating surfaces on the flange yokes.
2. Rework or replace the yokes. Refer to Parking Brake Cable Adjuster Disabling in Park Brake.

Is roughness or vibration still evident?

Go to Step 15

System OK

Inspect the propeller shaft. Refer to Driveline Working Angles Measurement in Vibration Diagnosis and Correction.

Is the propeller shaft unbalanced?

Go to Step 16

Go to Step 17

1. Inspect the propeller shaft for a missing balance weight.
2. Remove the propeller shaft.
3. Install the propeller shaft to the companion flange 180 degree from the original position.

Is roughness or vibration still evident?

Go to Step 17

System OK

Inspect the parking brake drum. Refer to Park Brake Drum Inspection in Park Brake.

Is the parking brake drum unbalanced?

Go to Step 18

Go to Step 19

Replace the parking brake drum. Refer to Propeller Shaft Parking Brake Drum Replacement in Park Brake.

Is roughness or vibration still evident?

Go to Step 19

System OK

Inspect the rear joint angle. Refer to Driveline Working Angles Measurement in Vibration Diagnosis and Correction.

Is the angle too large or too small?

Go to Step 20

Go to Step 21

1. Check the rear joint angle. Refer to Driveline Working Angles Measurement in Vibration Diagnosis and Correction.
2. Correct the rear joint angle.

Is roughness or vibration still evident?

Go to Step 21

System OK

Inspect the slip yoke spline.

Is the slip yoke spline excessively loose?

Go to Step 22

Go to Step 23

Replace the parts as necessary.

Is roughness or vibration still evident?

Go to Step 23

System OK

Inspect the yokes.

Are the yokes distorted or damaged?

Go to Step 24

Go to Step 25

Install the new yokes.

Is roughness or vibration still evident?

Go to Step 25

System OK

Inspect the yokes.

Are the yokes out of parallel to each other?

Go to Step 26

Go to Step 26

Inspect the propeller shaft.

Is there dirt or debris on the propeller shaft?

Go to Step 27

Go to Step 28

Clean the propeller shaft. Refer to Driveline Working Angles Measurement in Vibration Diagnosis and Correction.

Is roughness or vibration still evident?

Go to Step 28

Go to Step 29

Inspect the propeller shaft.

Is the propeller shaft bent or dented?

Go to Step 29

System OK

Replace the propeller shaft. Refer to one of the following procedures:

Is the replacement complete?

System OK

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