Acura 3.5 RL Manual page 478

Description
Power Flow (cont'd)
In or position, the optimum gear is automatically selected from 1st, 2nd, 3rd, and 4th gears, according to conditions
such as the balance between throttle opening (engine load) and vehicle speed.
or Position, 1st gear
1. The hydraulic pressure is applied to the 1st clutch, which rotates together with the mainshaft, causing the mainshaft 1st
gear to rotate.
2. Power is transmitted to the countershaft 1st gear, which drives the countershaft via the one-way clutches.
3. Power is transmitted to the secondary drive gear, which drives the secondary driven gear.
NOTE: In or position, hydraulic pressure is not applied to the 1st-hold clutch.
TORQUE CONVERTER
SECONDARY
DRIVE GEAR
1ST CLUTCH
COUNTERSHAFT
1ST GEAR
SECONDARY DRIVEN
GEAR
MAINSHAFT
1ST GEAR
PARK GEAR
2ND GEAR
ONE-WAY CLUTCH
1ST GEAR
ONE-WAY
CLUTCH
MAINSHAFT
COUNTERSHAFT