1997 MERCEDES-BENZ ML320 Complete Repair Manual

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Page 1345 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Fig. 102: Temperature Sensor, Location/Task/Design/Function

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:1

Page 1346 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Courtesy of MECHANICS MONTHLY MAGAZINE
Temperature Sensor, Location

The transmission oil temperature sensor (Y3/6bl) is located in the electrical control unit (Y3/6) and is
permanently connected t

Page 1347 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Fig. 103: Temperature Sensor, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Operation
The temperature of the transmission oil has a major influence on the shift time and thus on the shift q

Page 1348 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual The transmission oil temperature sens or (Y3/6b1) is connected in series with the starter lockout contact
(Y3/6s1). The temperature signal is tr ansmitted to the ETC control module (N 15/3) only th

Page 1349 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual selected by the driver.
Torque Converter Lock-Up Clutch, Location/Task/Design/Function
Fig. 105: Torque Converter Lockup Clut ch, Location/Task/Design/Function
Courtesy of MERCEDES-BENZ OF NORTH

Page 1350 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual
The external plate carrier (16a) is connected to the impeller (P) via the cover shell (17). The internal plate
carrier (16b) is connected to the turbine wheel (T).
Torque Converter Lockup Clutch,

Page 1351 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual
2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:28 PMPage 182 © 2006 Mitchell Repair Information Company,

Page 1352 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Fig. 106: Torque Converter Lockup Clutch, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Operation
When actuated by the ETC control module (N15/3), oil pressure controlled by the torque conve

Fig. 106: Torque Converter Lockup Clutch, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Operation
When actuated by the ETC control module (N15/3), oil pressure controlled by the torque converter lockup
PWM solenoid Valve (Y3/6y6) is directed through the input shaft (1) to the pressure chamber behind the piston
(16d). See Fig. 106
. The piston presses the clutch pack (16c) together and allows torque to be transferred
directly between the impeller (P) and turbine wheel (T). The torque converter lockup clutch is activated in 5th,
4th and 3rd gears in relation to the engine speed and engine load.
AUTOMATIC TRANSMISSION, FUNCTION
Transmission without touch shift. 722.6 in MODEL 163, 170, 202, 208, 210.
Transmission 722.6 in MODEL 129, 140.
Automatic transmission 722.6 is an electronically controlled 5-speed transmission with a lockup clutch in the
torque converter.
The ratios for the gear stages are achieved by three planetary gear sets. The 5th gear is designed with a step-up
ratio as an overdrive.
Shifting is initiated electronically. The gears are shifted by the corresponding combination of three
hydraulically actuated multi-plate brakes, three hydraulically actuated multi-disc clutches and two mechanical
freewheels.
Basically automatic transmission 722.6 with electronic control offers the following advantages:
Reduced fuel consumption
Improved shift comfort
More favorable gear steps as a result of 5 gears
Enhanced life and reliability
Reduced servicing costs
The electrohydraulic control unit is bolted onto the bottom of the transmission housing. The end of the
transmission is formed by an oil pan made of sheet steel.
The oil pressure for the converter lockup clutch and center multiple disc clutch is supplied via holes in the input
shaft. The oil pressure to the rear multiple-disc clutch is routed through the output shaft. The lubricating oil is
supplied and distributed by additional bore holes in both shafts. All bearing points of the gear sets as well as
freewheels and shift elements are supplied with lubricating oil.
The parking lock gear and drive flange are connected to the output shaft by gearing.
Freewheels F1 and F2 optimize shiftin
g. The front freewheel (F1) rests against the stator shaft extension on the

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:28 PMPage 183 © 2006 Mitchell Repair Information Company, LLC.

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