You didn't have the gearshift out of the transmission back around when you parked it,did you? I had that happen once,and it was because I'd pulled the shifter out to heat and bend it with the torch,and when I put it back I missed the gates. I fought that damned thing for half an hour before I decided to remove it again and see if I'd dropped something down the hole and jammed something. Nothing wrong that I could see,and when I replaced the shifter I realized what I'd done wrong the first time,tried it the same way to verify,it wouldn't shift,pulled it out and changed the angle a little,dropped it into place and everything worked great from then on.
Just a possibility.
Speed
