Acura 3.5 RL Manual page 481

Position, 4th gear
1. The hydraulic pressure is applied to the 4th clutch, which rotates together with the mainshaft, causing the mainshaft
4th gear to rotate.
2. Power is transmitted to the countershaft 4th gear, which drives the countershaft.
3. Power is transmitted to the secondary drive gear, which drives the secondary driven gear.
NOTE: In position, 4th gear, hydraulic pressure is also applied to the 1st clutch and to the 2nd clutch, but since the
rotation speed of 4th gear exceeds that of 2nd gear, power from 2nd gear is cut off at the 2nd gear one-way clutch.
TORQUE CONVERTER
SECONDARY
DRIVE GEAR
SECONDARY DRIVEN GEAR
MAINSHAFT
4TH CLUTCH
4TH GEAR
COUNTERSHAFT
4TH GEAR
MAINSHAFT
2ND GEAR
2ND CLUTCH
1ST CLUTCH
2ND GEAR
ONE-WAY CLUTCH
COUNTERSHAFT
2ND GEAR
MAINSHAFT
COUNTERSHAFT