High Row Brake (In) - stops the sun wheel of the boost row.
Clutch No. 1 of the freewheel of the increasing row (F1) - when the brake of the second gear is on, it prohibits the counterclockwise rotation of the sun gears of the front and rear planetary gear sets.
Forward clutch (C1) - connects the input shaft and the epicycle of the front planetary gear set.
2nd gear brake (AT 2) - stops the outer ring of freewheel No. 1, thus prohibiting the rotation of the sun gears of the front and rear planetary gears counterclockwise.
1st gear and reverse brake (AT 3) - stops the carrier of the rear planetary gear set.
Freewheel No. 2 (F2) – prohibits the rotation of the carrier of the rear planetary gear set counterclockwise.
Direct clutch (C2) - connects the input shaft and the sun gears of the front and rear planetary gear sets.
Brake providing engine braking mode in second gear (IN 1) – stops the rotation of the sun gears of the front and rear planetary gear sets.
overdrive clutch (Fo) – when starting the engine, it connects the sun gear of the boost planetary gear set and the carrier of the boost planetary gear set.
Pic. 3.74. Planetary gear: 1 - blocking clutch of the increasing planetary gear set (So); 2 - brake boost planetary gear set (In); 3 - brake first gear and reverse gear (AT 3); 4 - freewheel No. 2 (F2); 5 - second gear brake