Power flow in 2nd gear, function - GF27.10-P-3012N

TRANSMISSION 722.9 in MODEL 171.4, 203, 230 up to Model Year 8

TRANSMISSION 722.9 in MODEL 209, 211, 215, 219, 220

TRANSMISSION 722.9 in MODEL 463.303/340/341

Fig 1: Power Flow In 2nd Gear Function Chart

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

The Ravigneaux gear set consists of the following components:

Short planet gears (PL2k)
Long planet gears (PL2l)
Small internal-geared wheel (5)
Dual planet carrier (6)
Sun gear (7)
Large internal-geared wheel (8)

The single front planetary gear system consists of the following components:

Planet gears (PL9)
Internal-geared wheel (12)
Planet carrier (13)
Sun gear (14)

The single rear planetary gear system consists of the following components:

Planet gears (PL6)
Internal-geared wheel (9)
Planet carrier (10)
Sun gear (11)

Power flow in 2nd gear, function

The following multi-disk brakes and multi-disk clutches are engaged:

Multi-disk brake B1 (B1)
Multi-disk brake B2 (B2)
Multi-disk clutch K3 (K3)

Ravigneaux gear set

The small internal-geared wheel (5) is driven by the transmission input shaft. The long planetary gears (PL2l) roll over the stalled sun gear (7) and transmit the torque increased as a result as well as the RPM reduced as a result to the dual planet carrier (6).

Single rear planetary gear system

The internal-geared wheel (9) rotates at the same speed due to the mechanical connection to the dual planet carrier (6). The planet gears (PL6) roll over the stalled sun gear (11) and transmit the rotary motion to the planet carrier (10).

Single front planetary gear system

The internal-geared wheel (12) has a mechanical connection to the planet carrier (10) and rotates at the same speed. The planet gears (PL9) roll on the stalled sun gear (14) and transfer the increased torque and reduced rotational speed as a result to the transmission output shaft via the planet carrier (13).

The transmission output shaft therefore rotates in the direction of rotation of the engine at reduced RPM relative to the transmission input shaft.

Torque converter, location/task/design/function		GF27.20-P-5100N
Planetary gear set, location/task/design/function	Ravigneaux gear set	GF27.50-P-5100N
Planetary gear set, location/task/design/function	Simple planetary gear system	GF27.50-P-5100NN
Multi-disk brake, location/task/design		GF27.51-P-5104N
Multi-disk clutch, location/task/design		GF27.51-P-5103N