3GR

3GR

3GR:

Power transmission pathway

[Operating components: C1 clutch, C3 clutch]





1. Input shaft (rotates clockwise) [same revolution as the torque converter's turbine runner]
2. Front planetary ring gear (rotates clockwise) [same revolution as the input shaft]
3. Front planetary pinion gear (rotates clockwise on its axis, orbits clockwise) [because the front planetary sun gear is locked by the oil pump, it is pressed against the front planetary ring gear and orbits the sun gear while rotating on its axis (because the front planetary ring gear has internal gears, the rotational direction does not change)]
4. Front planetary carrier (rotates clockwise) [reduction: same revolution as the front planetary pinion gear orbit revolution]
5. C1 clutch (rotates clockwise) [connects the front planetary carrier and the rear planetary rear sun gear]
6. C3 clutch (rotates clockwise) [connects the front planetary carrier and the rear planetary middle sun gear]
7. Rear planetary gear component (rotates clockwise) [because the rear planetary short pinion gear and the rear planetary long pinion gear are engaged, both the pinion gears are locked due to the difference in the rotational directions, and kinematic energy of the rear planetary sun gear and rear planetary middle sun gear is transmitted to the rear planetary ring gear]
8. Rear planetary ring gear (rotates clockwise) [same revolution as the rear planetary carrier]
9. Counter drive gear (rotates clockwise) [because the rear planetary ring gear is installed on the counter drive gear, the rotational direction and the revolution are same as the rear planetary ring gear]
10. Counter gear (rotates counterclockwise)
11. Differential ring gear (rotates clockwise)

Engine brake
^ When the engine brake is operating, driving force is transmitted from the tires.