Sky, It was the -799 that was throwing me off.
I found a service bulletin on the 753-05146 Service kit origin 9/30/05 revised 4/21/08. It has been out since 2005 so there has been no changes since 4/21/08 then except those they have not released notes on. The service kit includes a new cable as they made changes that required a new cable design. So if they don't change the setup again then transmission would thing needed next time.
Reference MTD Document 769-02005A
http://findmepdf.com/pdf_date_service_kit_753_05146.html