Measure end play between park pawl gear and grooved ball bearing - AR27.50-P-0600-06SYZ

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TRANSMISSION 722.96 in MODEL 204, 205, 212, 216, 217, 218, 221, 222

TRANSMISSION 722.97 in MODEL 212, 217, 218, 222

CHECK VALUES FOR GEAR SET

Number	Designation		TRANSMISSION 722.9
BE27.50-P-1004-01A	End play between park pawl gear and grooved ball bearing	mm	0, 20...0, 40

Fig 1: Identifying Parallel Rest (126 589 04 31 00)

Courtesy of MERCEDES-BENZ USA

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1038-04A	Loctite 7200	Henkel Loctite Deutschland GmbH
BR00.45-Z-1046-04A	Loctite 7063 cleaning spray (150 ml)	A 001 986 71 71 10

A digital vernier caliper is required to determine the shim thickness.

Cleaning

Thoroughly clean the faces and contact surfaces on the transfer case drive pinion, thrust plate on the park pawl gear, transmission output shaft, pilot bushing and sealing surface on the transmission housing.
Measure overall height (dimension a)
Measure and note down overall height (dimension a) using vernier caliper (01) as shown.
Overall height (dimension a): Measure from the pilot bushing (27s) through the transfer case drive pinion (4) to the parallel gauge (02).

Do not use any sharp-edged tools or abrasive paper.

The sealing surface will be damaged otherwise.

Check for absolute cleanliness.

Otherwise, an incorrect measurement will occur which will result in destruction of the automatic transmission.

Fig 2: Measuring Overall Height
Courtesy of MERCEDES-BENZ USA

Measure partial height 1 (dimension b)
Measure and note down partial height 1 (dimension b) using vernier caliper (01) as shown.
Partial height 1 (dimension b): Measure from face on transmission output shaft (7) to thrust plate on park pawl gear (6).

When measuring partial height 1 (dimension b), neither the pilot bushing (27s) nor the shim should be installed.

Fig 3: Measuring Partial Height 1
Courtesy of MERCEDES-BENZ USA

Measure partial height 2 (dimension c).
Mount transfer case drive pinion (4) onto transmission output shaft (7) and check it is correctly seated in the transmission housing (5).
Measure and note down partial height 2 (dimension c) using vernier caliper (01) as shown.
Partial height 2 (dimension c): Measure from face on transfer case drive pinion (4) to face on transmission output shaft (7).

When measuring partial height 2 (dimension c), neither the pilot bushing (27s) nor the shim (3) should be installed.

When measuring partial height 2 (dimension c) make sure that the vernier caliper (01) is located on the transmission output shaft's (7) face and that it is not measured on the threaded hole's chamfer.

Fig 4: Measuring Partial Height 2
Courtesy of MERCEDES-BENZ USA
Calculate thickness of shim (3):
The following values must first be added and then the overall height (dimension a) must be subtracted from the resulting value: + partial height 1 (dimension b) + partial height 2 (dimension c) + specified play/axial play check values (dimension: 0.2 to 0.4 mm) - overall height (dimension a) = Thickness of shim (3)

Fig 5: Shim, Transmission Housing, Transmission Output Shaft And Pilot Bushing
Courtesy of MERCEDES-BENZ USA

Calculation example for thickness of shim (3):

+82.57 mm (partial height 1 (dimension b))

+85.73 mm (partial height 2 (dimension c))

-0.3 mm (specified play/axial play - check values)

-166.47 mm (overall height (dimension a))

=1.53 mm (thickness of shim (3))
Adjust axial play; to do so, fit determined shim (3) over transmission output shaft (7) onto thrust plate on park pawl gear (6).
Shims (3) are available in thicknesses ranging from 1.4 to 2.1 mm in steps of 0.1 mm. In the above-mentioned calculation example, a shim (3) of thickness 1.5 mm is installed.