For awhile now my slush box has been not matching the gears right. Reverse is where park is, 1st is neutral and park doesn't fully engage. The shift linkage undetneath the car is loose. I can move it with my hands. It will put the shifter in the right spot in the center console, but 1st will slip into neutral if I gently nudge it.

What can I check, tighten at home? Anybody have similar issues?