GENERAL INFORMATION



  • This automatic transmission is a high torque capacity FF 6-speed A/T. By making the shift range into a multi step, a more effective engine torque transfer results.
  • The reduction of parts count from the conventional 5 A/T has improved the productivity.

Characteristics


Item
 Contents
Power/fuel consumption performance
 The gear ratio range (1st to 6th) of up to 6.1 has been adopted to combine the fuel consumption and power performance.
Shift control
 The A/T-ECU accommodating the controls of slip lock-up*1, INVECS-II*2, and manual shift control*2 has been adopted.
*1: Mechanism that controls the slip amount inside the torque converter
*2: Control which selects the optimum gear that matches the driving style or driving environment

SPECIFICATIONS


Transmission model
 W6AJA
Drive type
 4WD
Torque converter
 Model
 3-element, 1-stage, 2-phase
Stall torque ratio
 1.96
Lock-up
 Present
Shift position
 P-R-N-D + sport mode
Transmission type
 Forward 6-speed, reverse 1-stage
Front and rear switching
 Single pinion x 2 (front, rear)
Double pinion x 1 (reduction)
<Based on lepelletier system>
Clutch and brake
 Clutch x 3 (low clutch, 3-5 reverse clutch, high clutch)
Brake x 2 (2-6 brake, low and reverse brake)
Oil pump
 Trochoid type
Maximum hydraulic pressure
 2.0 MPa
Torque capacity
 320 N·m
Solenoid valve
 Linear x 6 pieces
ON/OFF x 2 pieces
Transmission ratio
 1st
 4.199
2nd
 2.405
3rd
 1.583
4th
 1.161
5th
 0.855
6th
 0.685
Reverse
 3.457
Primary reduction ratio: A
 1.071
Final reduction ratio: B
 3.333
A × B
 3.571
Weight (including A/T fluid)
 Approximately 103 kg
A/T fluid
 DIA QUEEN ATF - J2

SYSTEM CONFIGURATION




Parts name
 Function
Torque converter
 Composed of the cover converter, turbine assembly, stator, pump impeller assembly, and others. It increases the engine torque, and transfers the power to transmission.
Oil pump
 Composed of the gear, housing, cover, and others. It generates the oil pressure necessary for the A/T fluid circulation, and for the operations of clutch and brake.
Low clutch
 Composed of the clutch drum, piston, spring retainer assembly, drive plate, driven plate, and others. It links the plates by the hydraulic operation of piston, and transfers the power to the front internal gear.
3-5 reverse clutch
 The components are the same as for the low clutch. It links the plates by the hydraulic operation of piston, and transfers the power to the front sun gear.
High clutch
 The components are the same as for the low clutch. It links the plates by the hydraulic operation of piston, and transfers the power to the rear carrier.
Low and reverse brake
 Composed of the piston, spring retainer assembly, drive plate, driven plate, and others. It links the plates by the hydraulic operation of piston, and fixes the rear carrier.
2-6 brake
 The components are the same as for the low and reverse brake. It links the plates by the hydraulic operation of piston, and fixes the rear sun gear.
Input shaft
 It is spline-engaged with the reduction carrier. It transfers the power from the torque converter. For the shaft inner hole, there are the lubricant supply hole for the each sliding area inside the unit and the hydraulic pressure distribution hole for the lock-up ON-OFF.
Front planetary gear
 Composed of the carrier, sun gear, and internal gear. It increases or decreases the output rotation in relation to the input by fixing or releasing the carrier, sun gear, and internal gear.
Rear planetary gear
 The components are the same as for the front planetary gear. By fixing or releasing the carrier, sun gear, and internal gear, it increases or decreases the output rotation in relation to the input, and switches the rotation direction between normal and reverse.
Reduction planetary gear
 The components are the same as for the front planetary gear. By fixing or releasing the carrier, sun gear, and internal gear, it increases or decreases the output rotation in relation to the input.
4-point gear
 The power is transferred from the rear internal gear to the output gear → idler gear → reduction pinion gear → final gear.
Valve body assembly
 Controls the original pressure from the oil pump to the suitable hydraulic pressure for the line pressure control system, shift control system, lock-up control system, and lubrication system.