I still have the bad lock out of my 88 Camry pictured below... The lock works OK until a slight pressure is put on the brass colored bar that sticks out of the lock.. then the lock starts hanging up where the key won't turn... So suspect this piece that works the steering lock (and where there is any pressure on it), is the swinger on whether the worn lock hangs up or not..

<img src="http://personal.atl.bellsouth.net/rdu/e/_/e_dan/lock.jpg" alt="" />