automatic tranny problems
 

My buddy has a 2006 f250 4x4 auto. He called me earlier saying his truck started making clanking sounds in gear but park and neutral no unnormal sounds, also when braking he says it tries to push through the brakes. He is not very mechanicly smart. I had him check tranny and brake fluid and it was full on both. Im 45 mins away so im heading over there tommorow to check it out. Just seeing if there is common tranny problems like this and what i should look for. Any input is apprectiated thanks in advance.