1997 MERCEDES-BENZ ML320 Complete Repair Manual

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Page 1369 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Fig. 115: Automatic Transmi ssion, Driver Information
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Automatic Transmission, Gear Ratios
Fig. 116: Automatic Transmission, Gear Ratios
Courtesy of MER

Page 1370 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Operation
The term power transmission refers to the transmission of propulsion power and engine torques. Via the
mechanical/hydraulic connection between the engine, torque converter and the downstr

Page 1371 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Fig. 118: Power Flow In 1st Gear, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Principal of power transmission in 1st gear
The torque coming from the torque converter is increased and trans

Page 1372 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Center Multi-Disc Clutch (K2)
Center Multi-Disc Brake (B3)
Front Planetary Gear Set
The input shaft (1) drives the internal gear (V4). In drive mode the sun gear (V1) is supported via the

Center Multi-Disc Clutch (K2)
Center Multi-Disc Brake (B3)
Front Planetary Gear Set
The input shaft (1) drives the internal gear (V4). In drive mode the sun gear (V1) is supported via the locked
freewheel F1 and in overrun mode via the engaged front multi-disc brake (B1) in the housing (B1). The
planetary gears (V2) roll over the fixed sun gear (V1) and provide an increase in torque between the internal
gear (V4) and the planet carrier (V3). The planet carrier (V3) moves at reduced speed in the direction of engine
rotation.
Rear Planetary Gear Set
The internal gear (H4) turns at a reduced speed because of its mechanical connection to the front planet carrier
(H3). The sun gear (H1) is supported via the engaged rear multi-disc brake (B2) and in drive mode via the
locked freewheel (F2), in overrun mode via the engaged rear multi-disc clutch (K3) in the housing. The planet
gears (H2) roll over the fixed sun gear (H1) and provide an increase in torque between the internal gear (H4)
and the planet carrier (H3). The planet carrier (H3) moves at a reduced speed in the direction of engine rotation.
Center Planetary Gear Set
The ring gear (M4) is driven at the same speed as the rear planet carrier (H3) as a result of a mechanical
connection. The sun gear (M1) is supported in the housing via the rear multi-disc brake (B2) (M1). The planet
gears (M2) roll over the fixed sun gear (M1) and provide an increase in torque between the internal gear (M4)
and the planet carrier (M3). The output shaft (5) connected to the planet carrier (M3) turns at a reduced speed in
the running direction of the engine.
Torque Converter, Location/Task/Design/Function

See TORQUE CONVERTER, LOCATION/TASK/DESIGN/FUNCTION
.
Planetary Gear Set, Location/Task/Design/Function

See PLANETARY GEAR SET, LOCATION/TASK/DESIGN/FUNCTION
.
Multiple-Disc Brake, Location/Task/Design/Function

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

See MULTI
-PLATE CLUTCH, LOCATION/TASK/DESIGN/FUNCTION.
Location/Task/Design/Function Of Freewheel

See LOCATION/TASK/DESIGN/FUNCTION OF FREEWHEEL
.

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:28 PMPage 203 © 2006 Mitchell Repair Information Company, LLC.

Page 1373 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual PLANETARY GEAR SET, LOCATION/TASK/DESIGN/FUNCTION
Fig. 119: Planetary Gear Set, Location/Task/Design/Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Planetary Gear Set, Location

2001 Me

Page 1374 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual
Three planetary gear sets are used to produce the different gear ratios. These are located in the mechanical
part of the transmission as the front, center and rear planetary gear set (V, M, H).
Pl

Page 1375 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 206 © 2006 Mitchell Repair Information Company,

Page 1376 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Fig. 120: Planetary Gear Set, Function (1 Of 5)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Operation
The ring gear (1) and sun gear (3) elements of a planetary gear system are alternately driven a

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