Drive/Propeller Shaft: Adjustments
Requirements:
- Elimination of disturbances from faulty engine and transmission mounts, tension in exhaust assembly, etc.. Propeller shaft in perfect optical and mechanical condition.
- Balance or replace propeller shaft, if balance plates are missing or propeller shaft is suspected to have imbalance (refer to instructions supplied with balancing equipment).
Caution! A jacked up car may only be tested operated when the suspension of driven wheels is supported (deflection angle of output shafts). Never exceed the maximum speed specified for a car jacked up or on a dynamometer. Conform with safety regulations!
Centering Propeller Shaft:
- Loosen the exhaust assembly, engine mounts and transmission cross member. Apply Special Tool 26 1 020.
Application Points:
• Checkpoints on engine carrier at rear.
• With manual transmission - middle of cast rib.
• With automatic transmission - middle bolt of transmission extension. (Punch mark the pertinent checkpoint.)
• Move transmission to the side until the special tool gage shows equal spacing on left and right sides.
Checking Propeller Shaft Deflection Angle:
- Remove exhaust assembly, heat shield and, if applicable, splash guard.
- Place Special Tool 26 1 030 on an engine surface running perpendicular or parallel to the crankshaft.
- Set the Indicator perpendicular with help of the water scale. Read degrees.
Note: Always apply the gage 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.
- The following bearing surfaces are applicable depending on engine type and version.
- Place Special Tool 26 1 030 on the oil pan flange and determine the angle of engine inclination.
- Place Special Tool 26 1 030 and a helping rail (steel ruler) on the vibration damper and measure the angle of engine inclination.
- Apply gage on propeller shaft front section and measure angle.
- Measure deflection angle of joint disc and, if necessary, correct it with shims (up to max. 3 mm / 0.118") on the transmission suspension or center mount.
Example:
Engine angle 2° 16'
Propeller shaft angle -2° 06'
Joint disc deft. angle +0° 10'
- Apply gage on propeller shaft rear section and measure angle.
- Determine deflection angle of center mount and, if necessary, correct it with shims (up to max. 3 mm / 0.118") on transmission suspension or center mount.
- Apply gage on final drive with helping rail (steel ruler) and measure angle.
- Determine deflection angle of the universal joint and, if necessary, correct it with shims (up to max. 3 mm or 0.118") on the center mount.
Note: When correcting a deflection angle by installing shims, remember that the deflection angles of the adjacent joints will also change.
In general joints should have as small as possible deflection angles.
Hard Movement on Slide:
(Slide On Center Mount)
Important! The propeller shaft was balanced in assembled state and must not be turned in the slide.
- Mark position of propeller shaft sections to each other.
- Remove threaded sleeve (1), washer (2) and rubber ring (3).
- Check rubber ring, replacing if necessary. Disconnect propeller shaft on slide, Clean and lubricate keyway with Molykote Long-term 2.
- Assemble propeller shaft that marks are in one plane.
Note: Propeller shaft sections are mounted in such a manner that universal joints are in one plane.
If the slide had been disassembled by mistake without marking, it will only mean the possibility of installing the propeller shaft wrong by 180° because of balancing.
After finishing installation:
• Tighten threaded sleeve with Special Tool 26 1 040.
• Tightening torque 10 Nm (7.4 ft.lbs).
Hard Movement on Slide:
(Propeller Shaft For All Wheel Drive)
Important! The propeller shaft was balanced in assembled state and must not be turned in the slide.
- Mark position of propeller shaft sections to each other.
- Remove threaded sleeve (1), washer (2) and rubber ring (3).
- Check rubber ring, replacing if necessary.
- Disconnect propeller shaft on slide.
- Clean and lubricate keyway with Molykote Longterm 2.
- Assemble propeller shaft that marks are in one plane.
Installation:
• Check seal in dust cap, replacing if necessary.