Q&A

 Master

P0753 is a shift solenoid #1 failure (violet colored wire at solenoid, inside trans pan I think), P0773 is also a solenoid failure (blue/yellow wire at that solenoid), could be wiring, solenoid, transmission or computer failure need to follow test procedures to determine problem. There is a company that independent auto repair shops "buy" their information from that offer a very reasonable service to do it yourselvers. You can get a one week subscription or year subscription very cheap. The information is year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... great quality information same as the professionals have ,much better than generic workshop manuals from parts stores, much cheaper than the factory manual try http://bit.ly/mitchell_repair_manuals_online
and get an online repair manual subscription. Or another company called Alldata will have the test procedures.