amcentee

Hey all, my ford is acting up again. when i drive at all times, i notice the car seems to short shift from 1-2, and its never smooth like 2-3. lately iv noticed by the time my 10 minute commute to school is up, the car clunks when it downshifts into 1st. it sort of bumps the car a little too. i drove the car across the city last weekend, and by the time i got their the clunk had developed a mettallic sound to it. most of the time its just a regular ol' clunk though. any ideas on the possible problem? thanks in advance!