WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
Apply silicon grease to movable joints of the shift lock mechanism and shift lever.
Fig 1: Exploded View Of Shift Lever Assembly With Torque Specification