Honda Acura NSX 1991 Service Manual page 398

Description
1 Position
At 1 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 1 st clutch on the mainshaft and power is transmitted via the 1 st 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 ba obtained with 1st speed gear.
IST-HOLD
'ERSHAFT IST GEAR
14-10