Repair Hints

REPAIR HINTS:

A plus angle (+) results when the absolute angle measured first is less then the second measured absolute angle (1°55' versus 2°10', see (Example 1). On a negative angle (-), exactly the reverse applies. By using shims at the transmission crossmember, rear engine mount, center bearing and front rear axle center piece mount, a change in the overall drive shaft angle results. A correction of 1 mm at either the transmission crossmember, rear engine mount or center bearing results in a drive shaft angle change of 0°10'. Using a correction of 1 mm at the front rear axle center piece mount results in a drive shaft angle change of 0°15' - 0°20', depending on vehicle model type.
Shims used to shim the transmission crossmember and center bearing are to be fabricated to various thicknesses and to the overall dimensions as indicated in Figures 13 - 18. Shims for the front rear axle center piece mounts are available through Spare Parts (See Parts Information).
If a shim of > (greater than) 2 mm thickness is used. the corresponding mount bolt length must be increased by 5 mm. Please review Parts Information for available bolt lengths. Should a shim of > (greater than) 5 mm be required, the engine mounts, transmission mounts as well as the front rear axle center piece mount must be inspected for wear. Replace any worn or collapsed mounts and then recheck the drive shaft angles.

Please ensure that all drive shaft angle deviations remain within the mean permissible tolerance values (see Permissible tolerances of drive shaft angle deviation example 2).

Please review Figures 13-18 for the appropriate shims to lower the transmission crossmember




On model 124.034/036, the drive shaft angle is adjusted via 4 large chassis washers, part number 124 990 48 40, between the transmission cross- member and the frame floor (arrows, Figure 12).