Driving in 6th gear

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

The PCM turns shift solenoid valves A and B OFF in 6th gear. As the speed of the vehicle reaches the programmed value, the PCM activates A/T clutch pressure control solenoid valve B, and applies CPC pressure (56) to the shift valve B pressure port (56). As shift solenoid valve B remains OFF, shift valve B is moved to the left side by a spring force, to connect the CPC pressure port (56) on shift valve B and the 6th clutch pressure port (60). With this shift valve B movement, the CPC pressure (56) becomes 6th clutch pressure (60) at shift valve B, and flows to the 6th clutch. Then the 6th clutch is engaged by 6th clutch pressure (60). 1st clutch is also engaged, but since the rotation speed of the countershaft exceeds that of 1st gear, no power is transmitted because the one-way clutch causes 1st gear to free-wheel.

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

Fig 1: Automatic Transmission Hydraulic Flow Diagram - Driving In 6th Gear

Courtesy of AMERICAN HONDA MOTOR CO., INC.