Power flow in reverse gear, program selection "C", function - GF27.10-P-3025N

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

TRANSMISSION 722.9 in MODEL 211, 215, 219, 220

TRANSMISSION 722.9 in MODEL 209 except CODE (P98) Black Series

TRANSMISSION 722.9 in MODEL 463.303/340/341

Fig 1: Power Flow In Reverse Gear, Program Selection C 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 reverse gear, program selection "C", function

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

BR multi-disk brake BR
Multi-disk brake B3 (B3)
Multi-disk clutch K3 (K3)

Ravigneaux gear set

The small internal-geared wheel (5) is driven via the transmission input shaft. The long planet gears (PL2l) drive the short planet gears(PL2k) which roll in the stalled large internal-geared wheel (8). The increased torque and reduced rotational speed as a result are transmitted 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 on the sun gear (11). The sun gear (11) reverses its direction due to the stalled planet carrier (10).

Single front planetary gear system

There is a connection between the sun gear (14) and sun gear (11) via the engaged multi-disk clutch K3 (K3). As a result sun gear (14) rotates at the same speed and direction of rotation as the sun gear (11) and drives the planet gears (PL9). 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 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