Power flow in reverse gear, program selection "W", function - GF27.10-P-3016G

TRANSMISSION 722.6 in MODEL 129, 140, 170, 202, 203 up to 31.5.03, 208, 209.3 up to 31.5.03, 210, 211 up to 31.8.03, 215, 220 up to 31.8.02, 230 up to 31.8.03

Fig 1: Power Transmission Flow In Reverse Gear, Program Selection "W", Function Diagram (1 Of 2)

Fig 2: Power Transmission Flow In Reverse Gear, Program Selection "W", Function Diagram (2 Of 2)

Principle of power flow in reverse gear:

Program selection "W"

Torque from the torque converter is increased via the drive shaft (1)

Torque from the torque converter is increased via the drive shaft (1) and the center planetary gearset and rear planetary gearset and transferred with reversed direction of rotation to the output shaft (5).

The following components are not engaged:

Front multi-disk brake (B1)
Rear multi-disk brake (B2)
Freewheel (F1)
Freewheel (F2)
Center multi-disk clutch (K2)

Front planetary gearset

The planet carrier (V3) and sun gear (V1) are rigidly connected via the engaged front multi-disk clutch (K1). The planetary gearset is therefore locked and turns as a closed unit at the input speed due to the mechanical connection of the internal-geared wheel (V4) and drive shaft (1).

Rear planetary gearset

The engaged center multi-disk brake (B3) holds the planet carrier (H3) against the housing. The internal geared wheel (H4) turns at the input speed because of its mechanical connection with the locked planet carrier (V3). The planet gears (H2) turn between the internal-geared wheel (H4) and the sun gear (H1). The direction is reversed by the fixed planet carrier (H3) so that the sun gear (H1) turns in the opposite direction to the running direction of the engine.

Center planetary gearset

The internal geared wheel (M4) is held against the housing by the center multi-disk brake (B3) via the mechanical connection with the planet carrier (H3). The sun gear (M1) turns backwards due to the engaged rear multi-disk clutch K3. The planet gears (M2) turn on the fixed internal-geared wheel (M4) and increase the torque from the sun gear (M1) to the planet carrier (M3). The output shaft (5) connected to the planet carrier (M3) turns at a reduced speed in the opposite direction to the running direction of the engine.

	Torque converter, location/task/design/function		GF27.20-P-5100G
	Planetary gearset, location/task/design/function		GF27.50-P-5100G
	Multi-disk brake, location/task/design/function		GF27.51-P-5100G
	Multi-disk clutch, location/task/design/function		GF27.51-P-5101G
	Freewheel, location/task/design/function		GF27.51-P-5102G