Description And Operation
DESCRIPTION
A damper with a wide operating angle and low rigidity has been adopted in the torque converter of the automatic transmission to increase the lock-up range by suppressing the Noise, Vibration And Harshness (NVH). As a result, lock-up can be performed from 2nd gear, where it was conventionally possible from 5th gear, providing direct shift feel and improved fuel economy.
| 1 | Torque converter | 2 | Automatic transmission |
| 3 | Input Speed Sensor (ISS) | 4 | Output shaft seal |
| 5 | Output Speed Sensor (OSS) | 6 | Transmission Range Switch (TRS) |
| 7 | Torque converter hub seal | 8 | Electric oil pump (Not shown) |
| 9 | Transmission fluid filter (not present) | 10 | Solenoid valves |
| 11 | Transmission Fluid Temperature (TFT) sensor | 12 | Valve body |
| 13 | Transmission fluid cooler | 14 | Flex plate |
OPERATION
| Item | ||
| Transmission Type | Automatic - AW6R31 | |
| Gear Ratio | 1st | 3.552 |
| 2nd | 2.022 | |
| 3rd | 1.452 | |
| 4th | 1.000 | |
| 5th | 0.708 | |
| 6th | 0.599 | |
| Reverse | 3.893 | |
| Final Reduction Ratio | 4.100 | |
| Torque Converter Stall Torque Ratio | 2.00 | |
| 1 | Manual | 2 | Normal |
| 3 | Above 11km/h (7mph) | 4 | Below 11km/h (7mph) |
| 5 | Position/Range | 6 | Mode |
| 7 | Gear selected | 8 | Transmission ratio |
| 9 | TCC | 10 | Engine brake |
| 11 | C1 clutch | 12 | C2 clutch |
| 13 | C3 clutch | 14 | C4 clutch |
| 15 | B1 brake | 16 | B2 brake |
| 17 | B3 brake | 18 | B4 brake |
| 19 | F1 one-way clutch | 20 | F2 one-way clutch |
| 21 | F3 one-way clutch | 22 | F4 one-way clutch |
| 23 | Solenoid A | 24 | Solenoid B |
| 25 | Solenoid C | 26 | Solenoid D |
| 27 | Solenoid E | 28 | Solenoid F |
| 29 | Solenoid G | 30 | Operation of powertrain parts |
| 31 | ON/OFF type | 32 | Intervention of solenoids |
| 33 | Linear type | 34 | TCC control solenoid |
| *1 | Not operating when engine braking | *2 | Operating when AAS mode |
| ◦ | Operating | © | Operating when engine braking |
| Δ | Operating but contributes to power transmission | - | Not applicable |
TRANSMISSION OPERATION
| Position | Mode | Range | Gear Ratio | TCC | Engine Brake | Operation of Powertrain Parts | Operation of Solenoids | ||||||||||||||||||
| C1 Clutch | C2 Clutch | C3 Clutch | C4 Clutch | B1 Brake | B2 Brake | B3 Brake | B4 Brake | F1 One-way Clutch | F2 One-way Clutch | F3 One-way Clutch | F4 One-way Clutch | ON/OFF Type | Linear Type | ||||||||||||
| Shift Solenoid A | Shift Solenoid B | Shift Solenoid C | Shift Solenoid D | Shift Solenoid E | Shift Solenoid F | Shift Solenoid G | TCC Control Solenoid | ||||||||||||||||||
| P | - | Park | - | X | X | X | X | ||||||||||||||||||
| R | Less than 11 km/n (7 mph) | Reverse | X | X | X | X | X | X | X | X | |||||||||||||||
| Above 11 km/n (7 mph) | X | X | X | ||||||||||||||||||||||
| N | - | Neutral | - | X | X | X | X | ||||||||||||||||||
| D | Normal | 1st Gear | X | X | X | X | X | X | X | ||||||||||||||||
| 2nd Gear | X | X | X | X | X | X | X | X | X | X | X | X | |||||||||||||
| 3rd Gear | X | X | X | X | X | X | X | X | |||||||||||||||||
| 4th Gear | X | X | X | X | X | X | X | X | |||||||||||||||||
| 5th Gear | X | X | X | X | X | X | X | X | X | ||||||||||||||||
| 6th Gear | X | X | X | X | X | X | X | X | X | ||||||||||||||||
| M | Manual | 1st Gear | X | X | X | X | X | X | |||||||||||||||||
| 2nd Gear | X | X | X | X | X | X | X | X | X | X | |||||||||||||||
| 3rd Gear | X | X | X | X | X | X | X | X | X | ||||||||||||||||
| 4th Gear | X | X | X | X | X | X | X | X | |||||||||||||||||
| 5th Gear | X | X | X | X | X | X | X | X | X | ||||||||||||||||
| 6th Gear | X | X | X | X | X | X | X | X | X | ||||||||||||||||
The assembly is composed of 4 multi-plate clutches, 4 multi-disc brakes, 4 one-way clutches and 3 planetary gear assemblies: front, central and rear.
| Brake/clutch | Movement |
| C1 clutch | Engages the input shaft and the intermediate shaft via clutch F4 one-way. |
| C2 clutch | Engages the input shaft and the central spider. |
| C3 clutch | Engages the input shaft and the front sun gear. |
| C4 clutch | Engages the input shaft and the intermediate shaft. |
| B1 brake | Blocks rotation of the front spider. |
| B2 brake | Blocks rotation of the front and central annular gears. |
| B3 brake | Blocks the external annular gear of the one-way clutch F2. |
| B4 brake | Blocks rotation of the rear annular gear. |
| F1 one-way clutch | Blocks counter-clockwise rotation of the front spider on the gearbox. |
| F2 one-way clutch | Blocks counter-clockwise rotation of the front sun gear during operation of B3 brake. |
| F3 one-way clutch | Blocks counter-clockwise rotation of the rear annular gear. Blocks counter-clockwise rotation of the central spider. |
| F4 one-way clutch | Blocks counter-clockwise rotation of the intermediate shaft during operation of clutch C1. |
CROSS-SECTION
| 1 | C2 Clutch | 5 | C1 Clutch |
| 2 | C4 Clutch | 6 | F2 One-Way Clutch |
| 3 | C3 Clutch | 7 | F1 One-Way Clutch |
| 4 | F4 One-Way Clutch | 8 | F3 One-Way Clutch |
| 1 | Torque Converter Clutch (TCC) | 6 | B4 Brake |
| 2 | Transmission Oil Pump | 7 | Rear Planetary Gear Assembly |
| 3 | B3 Brake | 8 | Central Planetary Gear Assembly |
| 4 | B1 Brake | 9 | Front Planetary Gear Assembly |
| 5 | B2 Brake | 10 | Torque Converter |
STRUCTURAL VIEW
| 1 | Input | 10 | B2 Brake |
| 2 | C4 Clutch | 11 | F3 One-Way Clutch |
| 3 | C1 Clutch | 12 | B4 Brake |
| 4 | C2 Clutch | 13 | Output |
| 5 | C3 Clutch | 14 | Rear Planetary Gear Assembly |
| 6 | F2 One-Way Clutch | 15 | Central Planetary Gear Assembly |
| 7 | B3 Brake | 16 | Front Planetary Gear Assembly |
| 8 | F1 One-Way Clutch | 17 | F4 One-Way Clutch |
| 9 | B1 Brake | ||
FIRST GEAR
| 1 | Input | 11 | F3 One-Way Clutch |
| 2 | C4 Clutch | 12 | B4 Brake |
| 3 | C1 Clutch | 13 | Output |
| 4 | C2 Clutch | 14 | Rear Planetary Gear Assembly |
| 5 | C3 Clutch | 15 | Central Planetary Gear Assembly |
| 6 | F2 One-Way Clutch | 16 | Front Planetary Gear Assembly |
| 7 | B3 Brake | 17 | F4 One-Way Clutch |
| 8 | F1 One-Way Clutch | 18 | Operating |
| 9 | B1 Brake | 19 | Operating When Engine Braking |
| 10 | B2 Brake | ||
SECOND GEAR
| 1 | Input | 11 | F3 One-Way Clutch |
| 2 | C4 Clutch | 12 | B4 Brake |
| 3 | C1 Clutch | 13 | Output |
| 4 | C2 Clutch | 14 | Rear Planetary Gear Assembly |
| 5 | C3 Clutch | 15 | Central Planetary Gear Assembly |
| 6 | F2 One-Way Clutch | 16 | Front Planetary Gear Assembly |
| 7 | B3 Brake | 17 | F4 One-Way Clutch |
| 8 | F1 One-Way Clutch | 18 | Operating |
| 9 | B1 Brake | 19 | Operating When Engine Braking |
| 10 | B2 Brake | ||
THIRD GEAR
| 1 | Input | 11 | F3 One-Way Clutch |
| 2 | C4 Clutch | 12 | B4 Brake |
| 3 | C1 Clutch | 13 | Output |
| 4 | C2 Clutch | 14 | Rear Planetary Gear Assembly |
| 5 | C3 Clutch | 15 | Central Planetary Gear Assembly |
| 6 | F2 One-Way Clutch | 16 | Front Planetary Gear Assembly |
| 7 | B3 Brake | 17 | F4 One-Way Clutch |
| 8 | F1 One-Way Clutch | 18 | Operating |
| 9 | B1 Brake | 19 | Operating When Engine Braking |
| 10 | B2 Brake | 20 | Operating But Does Not Contribute to Power Transmission |
FOURTH GEAR
| 1 | Input | 11 | F3 One-Way Clutch |
| 2 | C4 Clutch | 12 | B4 Brake |
| 3 | C1 Clutch | 13 | Output |
| 4 | C2 Clutch | 14 | Rear Planetary Gear Assembly |
| 5 | C3 Clutch | 15 | Central Planetary Gear Assembly |
| 6 | F2 One-Way Clutch | 16 | Front Planetary Gear Assembly |
| 7 | B3 Brake | 17 | F4 One-Way Clutch |
| 8 | F1 One-Way Clutch | 18 | Operating |
| 9 | B1 Brake | 19 | Operating When Engine Braking |
| 10 | B2 Brake | 20 | Operating But Does Not Contribute to Power Transmission |
FIFTH GEAR
| 1 | Input | 11 | F3 One-Way Clutch |
| 2 | C4 Clutch | 12 | B4 Brake |
| 3 | C1 Clutch | 13 | Output |
| 4 | C2 Clutch | 14 | Rear Planetary Gear Assembly |
| 5 | C3 Clutch | 15 | Central Planetary Gear Assembly |
| 6 | F2 One-Way Clutch | 16 | Front Planetary Gear Assembly |
| 7 | B3 Brake | 17 | F4 One-Way Clutch |
| 8 | F1 One-Way Clutch | 18 | Operating |
| 9 | B1 Brake | 19 | Operating But Does Not Contribute to Power Transmission |
| 10 | B2 Brake | ||
SIXTH GEAR
| 1 | Input | 11 | F3 One-Way Clutch |
| 2 | C4 Clutch | 12 | B4 Brake |
| 3 | C1 Clutch | 13 | Output |
| 4 | C2 Clutch | 14 | Rear Planetary Gear Assembly |
| 5 | C3 Clutch | 15 | Central Planetary Gear Assembly |
| 6 | F2 One-Way Clutch | 16 | Front Planetary Gear Assembly |
| 7 | B3 Brake | 17 | F4 One-Way Clutch |
| 8 | F1 One-Way Clutch | 18 | Operating |
| 9 | B1 Brake | 19 | Operating When Engine Braking |
| 10 | B2 Brake | ||
REVERSE GEAR
| 1 | Input | 11 | F3 One-Way Clutch |
| 2 | C4 Clutch | 12 | B4 Brake |
| 3 | C1 Clutch | 13 | Output |
| 4 | C2 Clutch | 14 | Rear Planetary Gear Assembly |
| 5 | C3 Clutch | 15 | Central Planetary Gear Assembly |
| 6 | F2 One-Way Clutch | 16 | Front Planetary Gear Assembly |
| 7 | B3 Brake | 17 | F4 One-Way Clutch |
| 8 | F1 One-Way Clutch | 18 | Operating |
| 9 | B1 Brake | 19 | Operating But Does Not Contribute to Power Transmission |
| 10 | B2 Brake | ||
Valve Body
The valve bodies supply oil thanks to solenoid valves that switch the pressurized oil circuit from the oil pump. The solenoid valves are activated by control signals from the TCM to regulate the hydraulic pressure on the brakes and clutches, changing the gears and activating the lock-up clutch on the torque converter. In addition, a quantity of oil is sent to the torque converter, to the parts to be lubricated and the planetary gear assemblies.
| 1 | Output Speed Sensor (OSS) | 8 | Solenoid D |
| 2 | Input Speed Sensor (ISS) | 9 | Solenoid A |
| 3 | Torque Converter Clutch (TCC) solenoid | 10 | Solenoid E |
| 4 | Solenoid G | 11 | Solenoid F |
| 5 | Transmission Fluid Temperature (TFT) sensor | 12 | Line Pressure Solenoid |
| 6 | Solenoid C | 13 | Transmission Range Sensor (TRS) |
| 7 | Solenoid B | ||
| 1 | Transmission Control Module (TCM) | 14 | Epicyclic Gear Sets |
| 2 | Signal | 15 | Return |
| 3 | Valve Body Components | 16 | Oil Sump |
| 4 | Solenoids A, B, C, D, E, F, G | 17 | Oil Pump Pressure |
| 5 | Line Pressure Solenoid | 18 | Transmission Oil Pump |
| 6 | Torque Converter Clutch (TCC) Solenoid | 19 | Generates Hydraulic Pressure |
| 7 | Regulating Valve | 20 | Return |
| 8 | Modulating Valve | 21 | Return |
| 9 | Ensure Operation of the Hydraulic Pressure | 22 | Oil Radiator |
| 10 | Displacement Valves, Control Valves | 23 | Sends the Automatic Transmission Fluid (ATF) |
| 11 | Operating Pressure | 24 | Torque Converter |
| 12 | Brakes, Clutches | 25 | Sends the ATF |
| 13 | Lubrication | ||