Power Flow In 3RD Gear, Function - GF27.10-D-3013H

Transmission 722.6 in MODEL 906.111/113/131/133/135/153/155/211/213/231/233/235/253/255/611/613/631/633/635/637/653/655/657/711/713/731/733/735 

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

Principle of power flow in 3rd gear 

Via the input shaft (1) and involving the center planetary gear set the torque going out from the torque converter is increased and transmitted to the output shaft (5).

The following are not engaged:

• Multidisk brake B1 (21)
• Multidisk brake B3 (23)
• Overrunning clutch F1 (27)
• Overrunning clutch F2 (28)
• Multidisk clutch K3 (26)

Front planetary gear set 

The planet carrier (29/3) and the sun gear (29/1) are connected rigidly to each other via the engaged multidisk clutch K1 (24). The planetary gear set is therefore blocked and turns as a closed unit at the input speed due to the mechanical connection of the ring gear (29/4) and propeller shaft (1).

Rear planetary gear set 

The multidisk clutch K2 (25) is engaged and transmits the input rotational speed of the drive shaft (1) to the planet carrier (31/3) via the ring gear (31/4). Via the mechanical connection to the blocked front planetary gear set the ring gear (31/4) turns at the same rotational speed as the planet carrier (31/3). The planetary gear set is thus blocked and turns as a closed unit.

Center planetary gear set 

The ring gear (30/4) turns at the input rotational speed due to the engaged multidisk clutch K2 (25). The sun gear (30/1) is supported at the housing via the multidisk brake B2 (22). The planetary gears (30/2) roll on the fixed sun gear (30/1) and take care of a torque increase 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 engine rotation.