You need a live person to look at this. It could be as simple as the bolts came loose and fell out of the torque converter. A CV joint could have broken, although that is pretty uncommon, and you'd hear a grinding noise when you shifted back to "park". Most likely there's an internal problem in the transmission. Your mechanic will do some pressure tests to find out what is causing that.
A quick test of all the CV joints is to shift into "park", then try to move the car by hand. If you can move it more than few inches, inspect the joints and check if one of the inner joints is pulled out of the transmission. If it is, that's a relatively easy and inexpensive repair compared to rebuilding a transmission.
Monday, January 13th, 2014 AT 5:01 PM