1989 Honda Accord hard to believe

I took this car in to have the windsheild replaced, I picked it up, and drow about 6 blocks, and the transmission was suddenly slipping at 40mph. I dropped it down to 3rd, and no problem. I went to the nearest auro parts store I knew of, and checked my tranny fluid level, it seemed ok. I wnet to leave the lot and found I had no reverse either.

Is there anything that would explain this car suddenly going bad from the time I dropped it off, and picked it up. I had no problems at all that morning, and it was a 30 mile drive to the glass shop.

thank you,

Bob Pierce