1997 MERCEDES-BENZ ML320 automatic transmission

Shift Pressure Shift Valve, Location/Task/Function

See SHIFT PRESSURE SHIFT VALVE, LOCATION/TASK/FUNCTION
.
Overlap Regulating Valve, Location/Task/Function

See OVERLAP REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Location/Task/Function Of Command Valve

See LOCATION/TASK/FUNCTION OF COMMAND VALVE
.
Selector Valve, Location/Task

See SELECTOR VALVE, LOCATION/TASK
.
Location/Task/Design/Function Of Oil Pump

See LOCATION/TASK/DESIGN/FUNCTION OF OIL PUMP
.
Shift Valve Pressure, Function
Operation
The shift valve pressure is derived from the regulating valve pressure, regulated at the shift valve pressure
regulating valve and is then present:
1-2 And 4-5 Shift Solenoid Valve (Y3/6Y3)
3-4 Shift Solenoid Valve (Y3/6Y4)
2-3 Shift Solenoid Valve (Y3/6Y5)
Torque Converter Lockup PWM Solenoid Valve (Y3/6Y6)
3-4 And 2-3 Shift Pressure Valve Shift Valve
The shift valve pressure controls the command valves via the upshift/downshift solenoid valves.
Upshift/Downshift Solenoid Valve, Location/Task/Design/Function

See UPSHIFT/DOWNSHIFT SOLENOID VALVE, LOCATION/TASK/DESIGN/FUNCTION
.
Location/Task/Design/Function Of PWM Solenoid Valve, Torque Converter Lockup Clutch

See LOCATION/TASK/DESIGN/FUNCTION OF PWM SOLENOID VALVE, TORQUE
CONVERTER LOCKUP CLUTCH.
Shift Pressure Regulating Valve, Location/Task/Function


2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:29 PMPage 246 © 2006 Mitchell Repair Information Company, LLC.

See SHIFT PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION.
Shift Pressure Shift Valve, Location/Design/Function

See SHIFT PRESSURE SHIFT VALVE, LOCATION/TASK/FUNCTION
.
Shift Valve Pressure Regulating Valve, Location/Task/Function

See SHIFT VALVE PRESSURE REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Shift Pressure Regulating Solenoid Valve, Location/Task/Design/Function

See SHIFT PRESSURE REGULATING SOLENOID VALVE,
LOCATION/TASK/DESIGN/FUNCTION.
Multiple-Disc Brake, Location/Task/Design/Function

See MULTIPLE
-DISC BRAKE, LOCATION/TASK/DESIGN/FUNCTION.
Multiplate Clutch, Location/Task/Design/Function

See MULTI
-PLATE CLUTCH, LOCATION/TASK/DESIGN/FUNCTION.
Holding Pressure Shift Valve, Location/Design/Function

See HOLDING PRESSURE SHIFT VALVE, LOCATION/TASK/FUNCTION
.
Overlap Regulating Valve, Location/Design/Function

See OVERLAP REGULATING VALVE, LOCATION/TASK/FUNCTION
.
Location/Task/Function Of Command Valve

See LOCATION/TASK/FUNCTION OF COMMAND VALVE
.
Selector Valve, Location/Task

See SELECTOR VALVE, LOCATION/TASK
.
Location/Task/Design/Function Of Oil Pump

See LOCATION/TASK/DESIGN/FUNCTION OF OIL PUMP
.
Overlap Regulating Valve, Location/Task/Function

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:29 PMPage 247 © 2006 Mitchell Repair Information Company, LLC.

Fig. 138: Overlap Regulating Valve, Location/Task/Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Overlap Regulating Valve, Location

Each shift group is assigned one overlap regulating va lve. The 1-2/4-5 overlap regulating valve (30a) is
installed in the valve housing of the shift plate (2b) , the 2-3 overlap regulating valve (30b) and 4-5 (30c)
are installed in the valve housin g of the shift plate (2a). See Fig. 138
.
Overlap Regulating Valve, Location

The overlap regulating valve regulates th e pressure reduction during a shift phase.
Overlap Regulating Valve, Function

See OVERLAP REGULATING VALVE, FUNCTION
.
Shift Pressure Shift Valve, Location/Task/Function

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:29 PMPage 248 © 2006 Mitchell Repair Information Company, LLC.

Fig. 139: Shift Pressure Shift Valve, Location/Task/Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Shift Pressure Shift Valve, Location

Each shift group possesses one shift pr essure shift valve. The 1-2/4-5 shift pressure shift valves (29a) and
2-3 shift pressure shift valve (29b) are installed in the valve housing of the shift plate (2b), the 3-4 shift
pressure shift valve (29c) is installed in the valve housing of the shift plate (2a). See Fig. 139
.
Shift Pressure Shift Valve, Task

To assign shift pressure to the engaging shift actuator and to assign the overlap pressure, controlled by the
overlap re
gulating valve, to the disengaging shift actuator.

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:29 PMPage 249 © 2006 Mitchell Repair Information Company, LLC.

Shift Pressure Shift Valve, Function

See SHIFT PRESSURE SHIFT VALVE, FUNCTION
.
Shift Pressure Shift Valve, Function
Fig. 140: Shift Pressure Shift Valve, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Operation

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:29 PMPage 250 © 2006 Mitchell Repair Information Company, LLC.

When the multiple-disc brake (B) is engaged, the working pressure (p-A) is applied to the end face of the shift
valve (29) via the command valve (31). See Fig. 140
. Its shift condition is retained in the shift phase, whilst the
shift element pressure acting on the end face and which is variable during the shift phase is replaced by a
corresponding, constant pressure.
When the multiple-disc clutch (K) is engaged (K) the end face of the shift pressure shift valve (29) is
depressurized during the stationary and shift phases, here the shift condition is also retained during the shift
phase.
Torque Converter Lockup Clutch PWM Solenoid Valve, Design

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:29 PMPage 251 © 2006 Mitchell Repair Information Company, LLC.

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:29 PMPage 252 © 2006 Mitchell Repair Information Company, LLC.

Fig. 141: Torque Converter Lockup Clutch PWM Solenoid Valve
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Structure
The torque converter lockup PWM solenoid valve (Y3/6y6) is sealed off to the valve body of the shift plate (2a)
by an O-ring (34) and a seal (arrow). See Fig. 141
. The contact springs (32) on the PWM converter lockup
solenoid valve (Y3/6y6) engage in a slot in the conductor tracks (33). The force of the contact spring (32)
ensures safe contacts.
Manual Drive Mode Selection, Function (Without Touch Shift)

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:29 PMPage 253 © 2006 Mitchell Repair Information Company, LLC.