When I go up a hill my car can easily do 80 but yesterday when going up that hill it only went 50 and more. I push on the gas and it sounds like it's gonna take off like it should but it goes nowhere. And this happens on flat ground also.

I checked the oil.... It's fine.....I checked the radiator....It's fine.....I checked the transmission and I don't think it needs any fluid.....I guess I will have to wait until my boyfriend gets home to find out....I just drove it down the street and it does like a pull then lets go a little and then goes more....I just want my car back to normal again.....