Power flow in 1st gear, function - GF27.10-P-3011SXA

TRANSMISSION 722.6 in MODEL 204.0, 216, 221 up to Model Year 8

Fig 1: Identifying Sectional View Of Power Flow Diagram In 1St Gear

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying 1St Gear Power Flow Diagram

Courtesy of MERCEDES-BENZ USA

Principle of power transmission in 1st gear:

Via the drive shaft (1) and involving all 3 planetary gear sets the torque coming from the torque converter is increased and transmitted to the output shaft (5).

The following are not engaged:

Multi-disk clutch K1 (24)
Multi-disk clutch K2 (25)
Multi-disk brake B3 (23)

Front planetary gear set

The input shaft (1) drives the internal gear (29/4). In drive mode the sun gear (29/1) is supported via the locked freewheel F1 (27) and in overrun mode via the engaged multi-disk brake B1 (21) on the housing. The planetary gears (29/2) revolve around the stationary sun gear (29/1) and ensure that torque is increased when power is transmitted from the ring gear (29/4) to the planet carrier (29/3). The planet carrier (29/3) moves at reduced speed in the direction of rotation of the engine.

Rear planetary gear set

The ring gear (31/4) rotates at reduced speed due to the mechanical connection to the planet carrier (29/3). 31/1 The sun gear is supported by the engaged multi-disk brake B2 (22) and in drive mode via the locked freewheel F2 (28), in overrun mode via the engaged multi-disk clutch K3 (26) on the housing. The planetary gears (31/2) revolve around the stationary sun gear (31/1) and ensure that torque is increased when power is transmitted from the ring gear (31/4) to the planet carrier (31/3). The planet carrier (31/3) moves at reduced speed in the direction of rotation of the engine.

Center planetary gear set

Due to a mechanical connection the hollow gear (30/4) is driven at the same rotational speed as the planet carrier (31/3). The sun gear is supported at the housing via the multi-disk brake B2 (22) 30/1.

The planetary gears (30/2) revolve around the stationary sun gear (30/1) and ensure that torque is increased when power is transmitted from the ring gear (30/4) to the planet carrier (30/3). The output shaft (5) connected to the planet carrier (30/3) turns at a reduced speed in the direction of rotation of the engine.

	Torque converter component description		GF27.20-P-2010G
	Planetary gear set component description		GF27.50-P-2100G
	Multi-disk brake, component description		GF27.51-P-5105G
	Multi-disk clutch component description		GF27.51-P-2010G
	Freewheel, component description		GF27.51-P-5106G