GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Inspect the propeller shaft for the following conditions:

    • Bending
    • Damage

Is the propeller shaft bent or damaged?

--

Go to Step 2

Go to Step 3

2

Replace the propeller shaft.

Is there still roughness or vibration?

--

Go to Step 3

System OK

3

Inspect for undercoating on the propeller shaft.

Is there undercoating on the propeller shaft?

--

Go to Step 4

Go to Step 5

4

Remove the undercoating from the propeller shaft.

Is there still roughness or vibration?

--

Go to Step 5

System OK

5

Inspect the tires for the following conditions:

    • Unbalance
    • Vibration during vehicle operation at a speed of 48-80 km/h (30-50 mph)

Do the above conditions exist?

--

Go to Step 6

Go to Step 7

6

Balance the tires.

Is there still roughness or vibration?

--

Go to Step 7

System OK

7

Inspect the universal joints for tightness.

Are the universal joints tight?

--

Go to Step 8

Go to Step 9

8

If the universal joints are equipped with snap rings, tap on the yokes with a hammer in order to free up the universal joints.

If the joints cannot be freed up or if the joints feel rough, replace the joints.

Is there still roughness or vibration?

--

Go to Step 9

System OK

9

Inspect the universal joints for wear.

Are any of the universal joints worn?

--

Go to Step  10

Go to Step 11

10

Replace the worn universal joint(s).

Is there still roughness or vibration?

--

Go to Step 11

System OK

11

Inspect the fixed yoke for bending and inspect the flange for excessive runout.

Does either of the above conditions exist?

--

Go to Step 12

Go to Step 13

12

Replace the fixed yoke.

Is there still roughness or vibration?

--

Go to Step 13

System OK

13

Inspect the propeller shaft for lack of balance.

Is the propeller shaft unbalanced?

--

Go to Step 14

Go to Step 15

14

Inspect for the missing balance weight on the propeller shaft. Rotate the shaft 180 degrees on the fixed yoke.

Is there still roughness or vibration?

--

Go to Step 15

System OK

15

Inspect the universal joint for incorrect angle placement.

Is the universal joint at an incorrect angle?

--

Go to Step 16

Go to Step 17

16

Correct the universal joint angle.

Is there still roughness or vibration?

--

Go to Step 17

System OK

17

Inspect the yokes and the flanges for the following conditions:

    • Damage
    • Distortion

Are the yokes and/or the flanges damaged or distorted?

--

Go to Step 18

Go to Step 19

18

Replace the yokes and/or the flanges.

Is there still roughness or vibration?

--

Go to Step 19

System OK

19

Inspect the shaft for yokes that are out of phase.

Are the yokes out of phase on the shaft?

--

Go to Step 20

Go to Step 21

20

Replace the propeller shaft if the propeller shaft is a one-piece shaft.

Reindex the propeller shaft if the propeller shaft is a two-piece shaft.

Is there still roughness or vibration?

--

Go to Step 21

System OK

21

Inspect for driveline vibration during vehicle operation at a speed of 80 km/h (50 mph).

Is there driveline vibration at the specified speed?

--

Go to Step 22

--

22

Inspect the propeller shaft runout.

Inspect for missing balance weights on the propeller shaft.

Is there driveline vibration at the specified speed?

--

--

System OK