Gear shift plate
A — Working pressure adjustment valve. Lubrication pressure adjustment valve. 2-3 gear overlap adjustment valve
B — 1-2/4-5 gear shift unit. Gear shift pressure adjustment valve
C — 3-4 gear engagement unit
D — 2-3 gear engagement unit
Clutch locking control valve. Control valve B2
Disassembling the gear shift plate
71 - Bolts; 72 - Valve body cover; 73 - Sealing plate; 74 - Valve body; 82 - Retainer
(Original published on the website: mercedesman)
59 - Guide pin; 75 - Plastic Ball Valves; 76 - Steel Ball Valves; 143 - Central lock
72 - Valve body; 72.1 - Gear selector valve; 72.2 - 2-3 gear overlap adjustment valve with sleeve and piston; 72.3 - Lubrication pressure control valve; 72.4 - Working pressure regulation valve; 72.5 - 3-4 gear engagement locking valve; 72.6 - 3-4 gear shift control valve; 72.7 - 3-4 gear pressure switching valve; 72.8 - 3-4 gear overlap adjustment valve with sleeve and piston
74 - Valve body; 74.14 - 1-2/4-5 gear shift control valve; 74.15 - 1-2/4-5 gear engagement locking valve; 74.18 - 1-2/4-5 gear overlap adjustment valve with sleeve and piston; 74.19 - Gearshift Pressure Regulating Valve; 74.20 - Pressure regulating valve control valve; 74.21 - Changeover valve pressure control valve; 74.22 - Torque converter lock-up adjustment valve; 74.24 - Pressure switching valve when engaging 3-4 gears; 74.25 - 2-3 gear engagement control valve; 74.26 - 2-3 gear engagement locking valve; 74.27 - Switching valve B2
The gear shift plate is shown in the illustration.
Disassembly
1. Unscrew the fasteners (82) (refer to the accompanying illustration).
2. Unscrew the bolts (71).
3. Remove the valve body cover (72) from the valve body (74).
4. Remove the sealing plate (73). All 12 balls are located in the valve body, four (75) of which are plastic, the remaining 8 (76) are steel.
5. Unscrew the valve body covers. The bushings and pistons of the adjusting valves 72.2, 72.8 and 74.18 must not be mixed up. The switching valve B2 can be removed and installed when the valve body cover is removed.
Assembly
Assembly is carried out in the reverse order of disassembly. Insert the guide pin (59) into the valve body (arrow).