Drive/Propeller Shaft: Adjustments

Vibration or Noise:

- Requirements:
• Propeller shaft In perfect optical condition.
• Balance the propeller shaft, if balance plates are missing or there is suspicion of propeller shaft imbalance (refer to operating Instructions supplied with the balancing machine).




Important! Test run a jacked-up car only with supported wheel suspension on the driven wheels (deflection angle of output shaft).

Never exceed the top speed specified for a car in jacked-up state or on a dynamometer test stand. Conform with safety precautions!

Centering Propeller Shaft:

- Loosen exhaust assembly, engine rubber mounts and transmission cross member.





- Apply Special Tool 26 1 020.





Application Points:
• Measuring points on engine carrier at rear.

Cars with Manual Transmission:
• Cast rib (punch mark measuring point).

Cars with Automatic Transmission:
• Center of oil drain plug.





- Move transmission sideways until special tool gage shows same distance on the left and right sides.

- Mount cross member.

- Tightening torque 21 Nm (15.5 ft.lbs).

Checking Deflection Angle of Propeller Shaft:





- Apply Special Tool 26 1 030 on the oil pan flange.





If Oil Pan Flange Is Not Accessible:
• Place Special Tool 26 1 030 on vibration damper with help of a rail (steel ruler).





- Set the indicator perpendicular with help of the water scale. Read degrees.

Note: Always apply the special tool with the scale in the same direction (e.g. scale right).

- One graduation = 5'.

- The position of the car is not important, since only separate angles are compared.





- Place special tool on propeller shaft front section and measure the angle. Determine deflection angle of joint coupling and, if necessary, correct by installing max. 3 mm (0.118') thick shims on transmission suspension or on center mount.

Example:
Engine angle 2° 16'
Propeller shaft angle -2° 06'
Joint coupling deflection angle 0° 10'

Note: When correcting deflection angles by installing shims, remember that this will change the deflection angle of neighboring joints.

In general a small as possible deflection angle on joints would be Ideal.





- Place special tool on the rear propeller shaft section and measure the angle Determine deflection angle of center mount and, if necessary, correct by installing shims of max. 3 mm (0.118") thickness on transmission suspension or on center mount.





- Place special tool on final drive with help of a rail (steel ruler) and measure the angle.

- Determine deflection angle of universal joint and, if necessary, correct by installing max. 3 mm (0.118") thick shims on the center mount.