2GR
2GR2GR:
Power transmission pathway
[Operating components: C1 clutch, B1 brake]
1. Input shaft (rotates clockwise) [same revolutions 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. Rear planetary rear sun gear (rotates clockwise) [same revolution as the front planetary carrier]
7. Rear planetary middle sun gear is locked by B1 brake
8. Rear planetary short pinion gear (rotates counterclockwise on its axis, orbits clockwise)
9. Rear planetary long pinion gear (rotates clockwise on its axis, orbits clockwise)
10. Rear planetary ring gear (rotates clockwise) [the rear planetary ring gear is rotated by the rear planetary long pinion gear (because the rear planetary ring gear has internal gears, the rotational direction does not change)]
11. 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 the same as the rear planetary ring gear]
12. Counter gear (rotates counterclockwise)
13. Differential ring gear (rotates clockwise)
Engine brake
^ When the engine brake is operating, driving force is transmitted from the tires.