Nag1 Automatic Transmission (Service Information): Clutches-Holding: Operation
| 1 - B1 CLUTCH | 10 - CENTER PLANETARY GEARSET ANNULUS GEAR |
| 2 - EXTERNALLY TOOTHED DISC | 11 - CENTER PLANETARY GEARSET PINION GEARS |
| 3 - INTERNALLY TOOTHED DISC | 12 - CENTER PLANETARY GEARSET SUN GEAR |
| 4 - B3 CLUTCH | 13 - FRONT PLANETARY GEARSET PINION GEARS |
| 5 - B2 CLUTCH | 14 - FRONT PLANETARY GEARSET SUN GEAR |
| 6 - B3 CLUTCH PISTON | 15 - B1 CLUTCH INTERNALLY TOOTHED DISC CARRIER |
| 7 - B2 CLUTCH PISTON | 16 - B1 CLUTCH PISTON |
| 8 - B2 CLUTCH INTERNALLY TOOTHED DISC CARRIER | 17 - B1 CLUTCH EXTERNALLY TOOTHED DISC CARRIER |
| 9 - REAR PLANETARY GEARSET PLANETARY CARRIER |
The holding clutches connect the annulus gear, sun gear, or planetary carrier of a planetary gear set against the transmission housing in order to transmit the drive torque. See Fig 1.
If the piston (16) on multiple-disc holding clutch B1 (1) is subjected to oil pressure, it presses the internal (3) and external discs (2) of the disc set together. The internally toothed disc carrier (15) locks the sun gear (14) against the housing. The planetary pinion gears (13) turn on the sun gear (14).
If the multiple-disc holding clutch B2 (5) is actuated via the piston (7), the piston compresses the disc set. The internally toothed disc carrier (8) locks the sun gear (12) against the housing. The planetary pinion gears (11) turn on the sun gear (12).
If the multiple-disc holding clutch B3 (4) is actuated via the piston (6), the planetary carrier (9) and the annulus gear (10) are locked. When the multiple-disc brake B3 (4) is actuated, the direction of rotation is reversed.