Shift Shock, AT light, DTC P0772... Any experiences?
 

2006 4dr, 2.3L automatic.

AT light on, sometimes with CEL.
Local mechanic said that err code is DTC P0772.
He suggest, at first, ATF change.
But he said that it works or it doesn't work.
(Since I'm second owner, I don't know when ATF was changed or flushed.)

Do you have any experience?