I have a 2011 f150 with the electronic locking rear ends, but the selector only allows me to lock both diff's and only in 4x4 not just the rear diff when in 4x2. i want to be able to just lock the rear diff in 2 wheel dr, and i know the 2013's have that function. so I'm asking if i buy and replace my 4x4 selector with a 4x4 selector with the 4x2 diff lock function will it work?