last night while driving around 75 mph tac suddenly went up to 4000 then right back down to around 2500-3000.it felt like i floored it then let up really fast..this happened about 3 times.i noticed if i reduced speed to 60mph or less this didnt occur anymore. i have a 95 contour se with 53000 miles.the transmission shifts ok but someone told me this might be an overdrive issue? wifey drove the car all day today and said it was fine.my question is what happens at 70-75 mph that dont happen at 40 mph?i checked trans fluid, level ok .not burnt. im still going to get a fluid change.thanks
