Power Flow In 1st Gear, Function - GF27.10-P-3011ANN

TRANSMISSION 722.905 in MODEL 166 as of model year 2016

TRANSMISSION 722.905 in MODEL 292

1st gear power flow

Function requirements for power flow in 1st gear, general

Circuit 15 ON
Internal combustion engine running

Power flow in 1st gear, general

The following multidisk brakes and multidisk clutches are engaged:

Multidisk brake B2 (43)
Multidisk brake B3 (45)
Multidisk clutch K3 (48)

In 1st gear, the power flows through the following gear sets:

Ravigneaux gear set
Rear single planetary gear set
Front single planetary gear set

Ravigneaux gear set

The small ring gear (5) is driven via the transmission input shaft. The long planetary gears (50) drive the short planetary gears (49) which roll in the stalled large ring gear (8). An increased torque and reduced rpm occur as a result which are transmitted to the dual planet carrier (6).

Rear single planetary gear set

The ring gear (9) rotates at the same speed due to the mechanical connection to the dual planet carrier (6). The planetary gears (51) roll over the stalled sun gear (11) and transmit the rotary motion to the planet carrier (10).

Front single planetary gear set

The ring gear (12) has a mechanical connection to the planet carrier (10) and rotates at the same speed. The planetary gears (52) roll on the stalled sun gear (14) and transfer the subsequently increased torque and reduced rotational speed to the main shaft via the planet carrier (13). The main shaft therefore rotates in the direction of engine rotation with reduced input speed.

Overview of system components for automatic transmission (AT)

GF27.10-P-9992ANN