So I was driving the 24 houres du Sarthe I with the Minolta 88C-V. I was in A-spec and about 2 hours in the car slowed down to 49 miles an hour. I wasnt in the pit, I was in the right gear and it happend in a straight. It wouldnt go so I decided to pit and go to B-spec. B-spec went less than 2 hours before the exact same thing happend. can anyone explain this to me?