1996 Saturn SC1 5 speed manual. Took my wife out to teach her how to drive it. Got the basic pull forward and reverse down. All of a sudden I looked on the ground in front of the car and it was spilling out antifreeze andout a pint or so. Eventually it stopped spilling and hasn't done it again since? Temperature is normal no symtoms of leaks inspected everything cant find leaks. What might this be? To much coolant even knowing this hasn't done this ever? It was steaming out of the resevoir tank the lid was on all the way. Also it has been hard to shift lately into 1st and 2nd. But only when the engine gets hot after 30 minutes or so. Otherwise shifts fine. Any suggestioons would help. Thanks