MERCEDES-BENZ ML430 1997 Complete Repair Manual

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:26 PMPage 102 © 2006 Mitchell Repair Information Company, LLC.

Fig. 56: 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 and
braked by the actuating elements of the multi-plate clutch and multiple-disc brake. See .Fig. 56
The planet gears
(2) can turn on the internal gearing of the ring gear (1) and on the external gearing of the sun gear (3). This
allows for a variety of gear ratios and the reversal of the rotation direction without the need for moving gear
wheels or shift collars.
The torque and speed are converted corresponding to the lever ratios or the ratio of the number of teeth on the
driven to the driving gears and is known as the gear ratio i. The overall ratio of a number of planetary gear sets
connected in series is obtained by multiplying the partial ratios. When two components of the planetary gear set
are locked together, the planetary gear set is locked and turns as a closed unit.
Advantages Of A Planetary Gear Set:
Shifting Ability Under Load
Several Ratios Can Be Produced
Constant Meshing Of The Gears
Simple Direction Reversal
High Efficiency
Coaxial Location Of Input And Output
Compact Design
The Following Basic Ratio Possibilities Can Be Realized
See Fig. 57
.
Sun Gear Locked
Ring Gear Driving
Planet Gears Driven
Relatively Low Step-Down Ratio

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:26 PMPage 103 © 2006 Mitchell Repair Information Company, LLC.

Fig. 57: Planetary Gear Set, Function (2 Of 5)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:26 PMPage 104 © 2006 Mitchell Repair Information Company, LLC.

See Fig. 58.
Hollow Gear Locked
Sun Gear Driving
Planet Gears Driven
Relatively High Step-Down Ratio

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:26 PMPage 105 © 2006 Mitchell Repair Information Company, LLC.

Fig. 58: Planetary Gear Set, Function (3 Of 5)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Locking two elements together so that the planetary gear set turns as a unit, produces a direct power

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:26 PMPage 106 © 2006 Mitchell Repair Information Company, LLC.

transmission (i =1). See Fig. 59.
Fig. 59: Planetary Gear Set, Function (4 Of 5)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:26 PMPage 107 © 2006 Mitchell Repair Information Company, LLC.

See Fig. 60.
Planetary Carrier Locked
Sun Gear Driving
Ring Gear Driven
Direction Reversal And Step-Down Ratio

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:26 PMPage 108 © 2006 Mitchell Repair Information Company, LLC.

Fig. 60: Planetary Gear Set, Function (5 Of 5)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Position Display, Location Task

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:26 PMPage 109 © 2006 Mitchell Repair Information Company, LLC.

Fig. 61: Position Display
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Position Display, Location

The position display (selector scheme symbols (87)) is accommodated in the floor shift cover. In addition
a gear display is located in the instrument cluster (A1). See Fig. 61
.
Position Display, Task


2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 110 © 2006 Mitchell Repair Information Company, LLC.

Via the selector scheme symbols (87) the alternative selector lever positions and their sequence are shown
symbolically.
Location/Task/Design/Function Of PWM Solenoid Valve, Torque Converter Lockup Clutch

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 111 © 2006 Mitchell Repair Information Company, LLC.