GF27.10-P-3030AHW Power Flow In Reverse Gear, Transmission Mode "S", Function

GF27.10-P-3030AHW Power Flow in Reverse Gear, Transmission Mode "S", Function
TRANSMISSION 722.9 (except 722.930) in MODEL 204.0 as of model year 2009 /YoM 08
TRANSMISSION 722.9 (except 722.930) in MODEL 204.2 as of model year 2009 /YoM 08
TRANSMISSION 722.9 (except 722.930) in MODEL 204.3
TRANSMISSION 722.9 in MODEL 204.9





2 Turbine wheel
3 Stator
4 Impeller
5 Small ring gear
6 Dual planet carrier
7 Sun gear
8 Large ring gear
9 Ring gear
10 Planet carrier
11 Sun gear
12 Ring gear
13 Planet carrier
14 Sun gear
16 Torque converter lockup clutch
41 Multidisk brake BR
42 Multidisk brake B1
43 Multidisk brake B2
45 Multidisk brake B3
46 Multidisk clutch K1
47 Multidisk clutch K2
48 Multidisk clutch K3
49 Short planetary gears
50 Long planetary gears
51 Planetary gears
52 Planetary gears

A Input
B Output

Function requirements for power flow in reverse gear in transmission mode "S", general
^ Circuit 87 (connected circuit 15) ON
^ Engine running

Power flow in reverse gear, transmission mode "S", general
The following multidisk brakes and multidisk clutches are engaged:
- Multidisk brake BR (41)
- Multidisk brake B1 (42)
- Multidisk clutch K3 (48)

In reverse gear with transmission mode "S", 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) roll over the stalled sun gear (7) and transmit the increased torque and reduced rotational speed as a result 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 on the sun gear (11). Due to the stalled planet carrier (10), the rotational direction of the sun gear (11) reverses.

Front single planetary gear set
There is a connection between the sun gear (14) and sun gear (11) via the engaged multidisk clutch K3 (48). As a result sun gear (14) rotates at the same speed and direction of rotation as sun gear (11) and drives the planetary gears (52). The increased torque and reduced rotational speed as a result are transmitted via the planet carrier (13) to the transmission output shaft. The transmission output shaft thus rotates at reduced transmission input speed opposite to the direction of the engine.