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Speed and torque are not converted by the direct gear ratio of the 4th gear. Power is transferred from Front Planetary Gear Set The planetary carrier (13) and sun gear (21) are connected via the engaged multiple-disc clutch K1 Rear Planetary Gear Set The multiple-disc clutch K2 (9) is engaged and transfers the input speed of the input shaft (25) to planetary carrier (15) due to the mechanical connec- Center Planetary Gear Set The annulus gear (10) turns at the input speed as a result of the engaged multiple-disc clutch K2 (9). Fig. 9 Fourth Gear Powerflow 1 - TORQUE CONVERTER LOCK-UP CLUTCH 14 - CENTER PLANETARY CARRIER 2 - TORQUE CONVERTER TURBINE 15 - REAR PLANETARY CARRIER 3 - TORQUE CONVERTER IMPELLER 16 - TORQUE CONVERTER STATOR 4 - HOLDING CLUTCH B1 17 - FRONT PLANETARY PINION GEARS 5 - HOLDING CLUTCH B3 18 - CENTER PLANETARY PINION GEARS 6 - HOLDING CLUTCH B2 19 - REAR PLANETARY PINION GEARS 7 - DRIVING CLUTCH K1 20 - FREEWHEELING CLUTCH F1 8 - FRONT PLANETARY ANNULUS GEAR 21 - FRONT PLANETARY SUN GEAR 9 - DRIVING CLUTCH K2 22 - CENTER PLANETARY SUN GEAR 10 - CENTER PLANETARY ANNULUS GEAR 23 - REAR PLANETARY SUN GEAR 11 - REAR PLANETARY ANNULUS GEAR 24 - FREEWHEELING CLUTCH F2 12 - DRIVING CLUTCH K3 25 - INPUT SHAFT 13 - FRONT PLANETARY CARRIER 26 - OUTPUT SHAFT A - ENGINE SPEED B - TRANSMISSION INPUT SPEED VA AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION 21 - 15 |