MAINSHAFT REVERSE GEAR
MAINSHAFT 1ST GEAR
1ST CLUTCH
1ST-HOLD CLUTCH
ONE-WAY CLUTCH
COUNTERSHAFT 1ST GEAR
PARKING GEAR
COUNTERSHAFT REVERSE GEAR
COUNTERSHAFT 4TH GEAR
2ND CLUTCH
SECONDARY SHAFT 2ND GEAR
SECONDARY SHAFT 3RD GEAR
FINAL DRIVEN GEAR
(cont’d)
FINAL DRIVE GEAR
TORQUE CONVERTER
3RD CLUTCH
COUNTERSHAFT
3RD CLUTCH
COUNTERSHAFT
2ND GEAR
4TH CLUTCH
MAINSHAFT
3RD GEAR
MAINSHAFT
4TH GEAR
O: Operates, x : Doesn’t operate. Although the 1st clutch engages, driving power is not transmitted as the one-way clutch slips.
Description
Power Flow (cont’d)
Position
At position, hydraulic pressure is applied to the 1st clutch and to the 1st-hold clutch.
The power flow when accelerating is as follows;
1. Hydraulic pressure is applied to the 1st clutch on the mainshaft and power is transmitted via the 1st clutch to the
mainshaft 1st gear.
2. Power transmitted to the mainshaft 1st gear is conveyed via the countershaft 1st gear to the one-way clutch on
the inside of the countershaft 1st gear. The one-way clutch is used to drive the countershaft.
3. Power is transmitted to the final drive gear and drives the final driven gear.
Hydraulic pressure is applied to the 1st-hold clutch but the countershaft is rotated by the one-way clutch.
The power flow when decelerating is as follows;
1. Rolling resistance from the road surface through the rear wheels to the final drive gear, then to the countershaft
1st gear via the Ist-hold clutch which is applied during deceleration.
2. The one-way clutch becomes free at this time because of the countershaft rotates in reverse at the time of accelerating.
3. The counterforce conveyed to the countershaft 1st gear turns the mainshaft 1st gear. At this time, since hydraulic
pressure is also applied to the 1 st clutch, counterforce is also transmitted to the mainshaft. As a result, engine braking
can be obtained with 1st gear.
1ST CLUTCH
MAINSHAFT 1ST GEAR
MAINSHAFT
TORQUE CONVERTER
COUNTERSHAFT
FINAL DRIVEN GEAR
1ST-HOLD CLUTCH
COUNTERSHAFT 1ST GEAR
ONE-WAY CLUTCH
FINAL DRIVE GEAR
1. Power from the mainshaft 3rd gear drives the countershaft 3rd gear. Since at this time there is no hydraulic pressure
to the 3rd clutch. The countershaft 3rd gear turns freely and drives the secondary shaft 3rd gear.
2. The power is also transmitted to the secondary shaft 2nd gear because hydraulic pressure is applied to 2nd clutch.
3. The secondary shaft 2nd gear drives the countershaft 2nd gear. Power is transmitted to the final drive gear and
drives the final driven gear.
1ST CLUTCH
MAINSHAFT 3RD GEAR
MAINSHAFT 3RD GEAR
MAINSHAFT
COUNTERSHAFT
FINAL DRIVE GEAR
(cont’d)FINAL DRIVEN GEAR
SECONDARY SHAFT 3RD GEAR
SECONDARY SHAFT 2ND GEAR
2ND CLUTCH
SECONDARY SHAFT
ONE-WAY CLUTCH
Position is provided to drive only in 2nd speed.
TORQUE CONVERTER
NOTE:
At position, hydraulic pressure is also applied to the 1st clutch, but since the rotation speed of the 2nd gear
exceeds that of 1st gear, power from 1st gear is cut off at the one-way clutch.
Power flow in position, 2nd speed is the same as position.
Description
Power Flow (cont’d)
2. Power is transmitted to the final drive gear and drives the final driven gear.
MAINSHAFT 1ST GEAR
1ST CLUTCH
MAINSHAFT 3RD GEAR
MAINSHAFT
TORQUE CONVERTER
COUNTERSHAFT
FINAL DRIVE GEAR
FINAL DRIVEN GEAR
3RD CLUTCH
COUNTERSHAFT 3RD GEAR
ONE-WAY CLUTCH
Position is provided to drive only in 3rd speed.
At 3 position, hydraulic pressure is also applied to the 1st clutch, but since the rotation speed of the 3rd gear
exceeds that of 1st gear, power from 1st gear is cut off at the one-way clutch.
Power flow in position, 3rd speed is the same as position.
In position, the optimum gear is automatically selected from the gear ratios of 1st, 2nd 3rd and 4th speeds, according
to conditions such as the balance between throttle opening (engine load) and vehicle speed.
1ST CLUTCH
MAINSHAFT 1ST GEAR
MAINSHAFT
TORQUE CONVERTER
COUNTERSHAFT
FINAL DRIVE GEAR
(cont’d)FINAL DRIVEN GEAR
PARKING GEAR
COUNTERSHAFT
1ST GEAR
ONE-WAY CLUTCH
Position, 1st speed
1 . Hydraulic pressure is applied to the 1st clutch, which rotates together with the mainshaft, and the mainshaft 1st
gear rotates.
2. Power is transmitted to the countershaft 1st gear, and drives the countershaft via the one-way clutch.
3. Power is transmitted to the final drive gear and drives the final driven gear.
NOTE: In the position, hydraulic pressure is not applied to the 1st-hold clutch.
Description
Power Flow (cont’d)
1 . Hydraulic pressure is applied to the 4th clutch, which rotates together with the mainshaft, and the mainshaft 4th
gear rotates.
2. Power is transmitted through countershaft 4th gear to the countershaft.
3. Power is transmitted to the final drive gear and drives the final driven gear.
NOTE: At position, 4th speed, hydraulic pressure is also applied to the 1 st clutch, but since the rotation speed of
4th gear exceeds that of 1st gear, power from 1st gear is cut off at the one-way clutch.
1ST CLUTCH
MAINSHAFT
1ST GEAR
MAINSHAFT
4TH GEAR
4TH CLUTCH
MAINSHAFT
TORQUE CONVERTER
COUNTERSHAFT
FINAL DRIVE GEAR
FINAL DRIVEN GEAR
COUNTERSHAFT 4TH GEAR
ONE-WAY CLUTCH
Position, 4th speed