Acura RL. Manual - part 231

converter pressure (91) leading to the right side of the torque converter. Torque converter back pressure is
released fully, and torque converter clutch is engaged fully.

Fig. 63: Power Flow Diagram (Full Lock-Up)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Shift Lever Mechanism

The shift lever has five positions; P, R, N, D, and D3. D has two modes; automatic shift mode and sequential
shift mode with the shift lever moved to M. The shift lever movement and position is indicated by the A/T gear
position indicator panel. The shift lock/reverse lock mechanism is an additional shift lever lockout mechanism;
the shift lever can be shifted out of P and into R without pressing the shift lever. The shift lever is engaged with
the shift lever link in P, R, N, D, and D3. This unit shifts the transmission using the shift cable connected
between the shift cable link and the transmission control shaft.

In M, the shift lever is disengaged from the shift lever link, and the shift lever can be used to shift gears
manually between 1st through 5th, much like a manual transmission.

NOTE:

When used, "left" or "right" indicates direction on the hydraulic circuit.

2007 Acura RL

2005-08 TRANSMISSION Automatic Transmission - RL

Friday, June 05, 2009 1:18:11 PM

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Fig. 64: Identifying Shift Lever Mechanism Components
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Shift Lever Mechanism in M

When the shift lever shifts to M, the shift lever is disengaged from the shift lever link/shift lever pivot, and the
shift lever link lock pops up to engage with the shift lever bracket base; the shift lever link/shift lever pivot and
shifting position in the transmission are held in D.

The shift lever link lock is spring loaded, it pops up in M, and does not engage the shift lever link/shift lever
pivot in any position except M.

2007 Acura RL

2005-08 TRANSMISSION Automatic Transmission - RL

Friday, June 05, 2009 1:18:11 PM

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Fig. 65: Moving Shift Lever
Courtesy of AMERICAN HONDA MOTOR CO., INC.

The shift lever fits into M by using a detent plunger with a spring. When shifting to upshift and downshift
positions, the detent plunger is depressed by the detent bracket inner wall, and detent plunger spring puts the
shift lever back into the neutral position. The detent plunger also works in P.

Fig. 66: Moving Shift Lever To Upshift And Downshift Positions
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Shift Lock/Reverse Lock Mechanism

The shift lock system reduces the risk of the starting the engine in gear. Starting the engine is possible only in P
and N. The shift lock mechanism consists of the shift lock solenoid, shift lock stop/reverse lock stop, shift lock

2007 Acura RL

2005-08 TRANSMISSION Automatic Transmission - RL

Friday, June 05, 2009 1:18:11 PM

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release, and related parts. The reverse lock mechanism shares the shift lock mechanism. The shift lock solenoid
is electronically controlled by the shift lock/reverse lock control system signals. If the shift lock solenoid does
not operate, the shift lock/reverse lock mechanism can be released by pressing the shift lock release.

In P while pressing the brake pedal and throttle fully closed, the shift lock solenoid is turned ON, and the shift
lock solenoid plunger is retracted, releasing the shift lock stop. This allows the shift lever to be moved.

Fig. 67: Releasing Shift Lock Stop
Courtesy of AMERICAN HONDA MOTOR CO., INC.

When the brake pedal is released or the accelerator is pressed, the shift lock solenoid stays OFF, and the shift
lock stop locks the shift lever in P.

Fig. 68: Moving Shift Lever

2007 Acura RL

2005-08 TRANSMISSION Automatic Transmission - RL

Friday, June 05, 2009 1:18:11 PM

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