4th Clutch
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 4th clutch engages/disengages 4th gear, and is located at the right end of the third shaft. The 4th clutch is supplied hydraulic pressure through the third shaft by a circuit connected to the internal hydraulic circuit. The vehicle also moves backward when the 4th clutch is engaged while the reverse selector hub engages with the reverse gear.