I have a 2001 3500 series. has been having shifting issues. engine light was on so I had the codes read. Can someone please tell me how bad is this?

Here are some code that were read in the truck today
P0722 output speed sensor circuit no/los signal
P0733 incorrect gear 3 ratio
P1711 trans pressure switch is stuck closed.

HELP!! Is it safe to drive? Whats the prognosis?

Anyone?

Moving to Allison OEM section...