In the owner’s manual of my 2012 T & C, it states that the auto locking feature is based on both speed and accelerator throttle position. Hence, once over 15 MPH or so, if the accelerator pedal is not depressed to a certain point, the auto locking feature does not activate. Also, that is why the auto locking feature locks at different times, depending on driving situations.
'17 Pacifica Limited, July ‘17 Build
Granite Crystal; Black/Mocha
Trailer Tow Package, Vacuum, All Safety Options
Previous, 2012 T & C Limited