RX 300 doesn't want to move more than a foot or two
I had the tranny serviced (reputable transmission shop we have used many times) to replace tranny fluid yesterday. Drove it home (about 12-15 mi altogether) with no problems. Son replaced oil/filter and air filter at home (couldn't get in with my regular mechanic for that). We started the car afterwards for a minute or two to get the oil circulating thru the system and then shut it off. This morning the car doesn't want to move. HELP!