got a 95 honda accord ex with 140000 miles on it. when you put it in gear it drives and shifts for a minute or so then the car just quits going. like its in neutral. i pull over and it won't engage in any gear. then i turn the key off and back on and it engages again and shifts through the gears okay and about 45 miles an hour goes dead again like its in neutral. just slips and won't go. i pull over and do the same thing. any suggestions?