Main Valve Body
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 main valve body contains shift valve C, the D inhibitor valve, the reverse inhibitor valve, the lock-up shift valve, the lubrication regulator valve, the lubrication shift valve, the ATF pump drive gear, the ATF pump driven gear, and the 4th/reverse air check valve. The primary function of the main valve body is to switch fluid pressure on and off to control hydraulic pressure going to the hydraulic control system.