Hello, got a problem tonight with the transmission. With the trans in park the cars rolls on its own. The shifter goes into park ok, except one time it felt a kind of binding, but just once. Any ideas where to start looking. I changed the fluid and filter last summer and has been running great.

Dave

2001 Bonneville SE, 3.8L VIN K, 72,000 miles

From the sounds of it, you have a broken parking pin.

Most likey internal pawl, but you could check the linkage to make sure it is getting full throw