POWERFLOW OPERATION [AY6A-EL, AY6AX-EL]

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List of operating components

Clutch / Brake

Operation
C1 clutch
•  Connects front planetary carrier to rear planetary rear sun gear
C2 clutch
•  Connects intermediate shaft to rear planetary carrier
C3 clutch
•  Connects front planetary carrier to rear planetary middle sun gear
B1 brake
•  Locks rear planetary middle sun gear
B2 brake
•  Locks rear planetary carrier
One-way clutch
•  Locks counterclockwise rotation of rear planetary carrier


1GR (D position)

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Power transmission pathway

 
[Operating components: C1 clutch, One-way clutch]
•  Operating components:
C1 clutch, One-way clutch (counterclockwise rotation is locked)

Planetary gear unit

Input, Locked, Output
Front
Input: Ring gear
Locked: Sun gear
Output: Carrier
Rear
Input: Rear sun gear
Locked: Carrier
Output: Ring gear

1.  Input shaft (rotates clockwise) [same revolutions as the torque converter’s turbine runner]

2.  Front planetary ring gear (rotates clockwise) [same revolutions 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 short pinion gear (rotates counterclockwise on its axis)

[the rear planetary carrier tries to rotate counterclockwise, but the counterclockwise rotation is locked by one-way clutch.]

8.  Rear planetary long pinion gear (rotates clockwise on its axis)

[the rear planetary middle sun gear rotates counterclockwise (idling)]

9.  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)]

10.  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]

11.  Counter gear (rotates counterclockwise)

12.  Differential ring gear (rotates clockwise)


1GR (M position)

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[Operating components: C1 clutch, B2 brake]
•  When the engine brake is operating, driving force is transmitted from the tires. Because the rear planetary carrier, which is locked in its counterclockwise rotation by the one-way clutch, tries to rotate clockwise, B2 brake is turned ON and the rear planetary carrier is locked, and kinetic energy is transmitted from the tires to the engine.

2GR

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Power transmission pathway

[Operating components: C1 clutch, B1 brake]

Planetary gear unit

Input, Locked, Output
Front
Input: Ring gear
Locked: Sun gear
Output: Carrier
Rear
Input: Rear Sun gear
Locked: Middle Sun gear
Output: Ring gear

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.


3GR

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Power transmission pathway

[Operating components: C1 clutch, C3 clutch]

Planetary gear unit

Input, Locked, Output
Front
Input: Ring gear
Locked: Sun gear
Output: Carrier
Rear
Input: Rear Sun gear, Middle Sun gear
Locked: -
Output: Ring gear

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 kinetic 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.


4GR

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Power transmission pathway

[Operating components: C1 clutch, C2 clutch]

Planetary gear unit

Input, Locked, Output
Front
Input: Ring gear
Locked: Sun gear
Output: Carrier
Rear
Input: Rear Sun gear, Carrier
Locked: -
Output: Ring gear

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.  Intermediate shaft (rotates clockwise) [same revolution as the input shaft]

7.  C2 clutch (rotates clockwise) [same revolution as the intermediate shaft]

8.  Rear planetary carrier (rotates clockwise) [same revolution as the intermediate shaft]

9.  Rear planetary short pinion gear (rotates clockwise on its axis, orbits clockwise)

[because the rear planetary carrier rotates faster than the rear planetary sun gear]

10.  Rear planetary long pinion gear (rotates counterclockwise on its axis, orbits clockwise)

11.  Rear planetary ring gear (rotates clockwise)

[because the rear planetary long pinion gear’s rotation is subtracted from the rear planetary carrier revolution, the rear planetary ring gear revolution is slower than those of the rear planetary carrier]

12.  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]

13.  Counter gear (rotates counterclockwise)

14.  Differential ring gear (rotates clockwise)


Engine brake

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


5GR

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Power transmission pathway

[Operating components: C2 clutch, C3 clutch]

Planetary gear unit

Input, Locked, Output
Front
Input: Ring gear
Locked: Sun gear
Output: Carrier
Rear
Input: Carrier, Middle Sun gear
Locked: -
Output: Ring gear

1.  Input shaft (rotates clockwise) [same revolutions as 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.  C3 clutch (rotates clockwise) [connects the front planetary carrier and the rear planetary middle sun gear]

6.  Rear planetary middle sun gear (rotates clockwise)

[same revolution as C3 clutch (decelerates by the front planetary gear, so the revolutions are slower than the input shaft)]

7.  Intermediate shaft (rotates clockwise) [same revolution as the input shaft]

8.  C2 clutch (rotates clockwise) [same revolution as the intermediate shaft]

9.  Rear planetary carrier (rotates clockwise) [same revolutions as intermediate shaft]

10.  Rear planetary long pinion gear (rotates clockwise on its axis, orbits clockwise)

[because the rear planetary carrier rotates faster than the rear planetary middle sun gear, the rear planetary middle pinion gear is pushed out by the speed difference, and orbits clockwise while rotating clockwise on its axis.]

11.  Rear planetary ring gear (rotates clockwise)

[because the rear planetary long pinion gear’s rotation is added to the rear planetary carrier revolutions, rear planetary ring gear revolution is faster than those of the rear planetary carrier]

12.  Counter drive gear (rotates clockwise)

[because the rear planetary ring gear is installed on the counter drive gear, the rotational direction and revolution are the same as the rear planetary ring gear]

13.  Counter gear (rotates counterclockwise)

14.  Differential ring gear (rotates clockwise)


Engine brake

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


6GR

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Power transmission pathway

[Operating components: B1 brake, C2 clutch]

Planetary gear unit

Input, Locked, Output
Front
-
Rear
Input: Carrier
Locked: Middle Sun gear
Output: Ring gear

1.  Input shaft (rotates clockwise) [same revolution as the torque converter’s turbine runner]

2.  Intermediate shaft (rotates clockwise) [same revolution as the torque converter’s turbine runner]

3.  B1 brake [locks the rear planetary middle sun gear]

4.  C2 clutch [connects the intermediate shaft and the rear planetary carrier]

5.  Rear planetary carrier (rotates clockwise) [same revolution as the intermediate shaft]

6.  Rear planetary long pinion gear (rotates clockwise on its axis, orbits clockwise)

[because the rear planetary middle sun gear is locked, it is always in a speed increasing condition]

7.  Rear planetary ring gear (rotates clockwise)

[because the rear planetary long pinion gear’s rotation is added to the rear planetary carrier revolution, the rear planetary ring gear revolution is faster than those of the rear planetary carrier]

8.  Counter drive gear (rotates clockwise)

[because the rear planetary ring gear is installed on the counter drive gear, the rotational direction and revolution are the same as the rear planetary ring gear]

9.  Counter gear (rotates counterclockwise)

10.  Differential ring gear (rotates clockwise)


Engine brake

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


R position

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Power transmission pathway

[Operating components: C3 clutch, B2 brake]

Planetary gear unit

Input, Locked, Output
Front
Input: Ring gear
Locked: Sun gear
Output: Carrier
Rear
Input: Middle Sun gear
Locked: Carrier
Output: Ring gear

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.  C3 clutch (rotates clockwise) [connects the front planetary carrier and the rear planetary middle sun gear]

6.  Rear planetary middle sun gear (rotates clockwise)

[same revolutions as the C3 clutch (rotates slower than the input shaft)]

7.  B2 brake [locks the rear planetary carrier]

8.  Rear planetary long pinion gear (rotates counterclockwise)

9.  Rear planetary ring gear (rotates counterclockwise)

[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)]

10.  Counter drive gear (rotates counterclockwise)

[because the rear planetary ring gear is installed on the counter drive gear, the rotational direction and revolution are the same as the rear planetary ring gear]

11.  Counter gear (rotates clockwise)

12.  Differential ring gear (rotates counterclockwise)


Engine brake

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