Whats Wrong?

When I press on my gas pedal on the highway or in the city, the car jerks real bad and doesn't accelerate. What could it be?

There are several things that could be wrong. Bad Throttle position sensor, bad injectors, plugged cat. bad transmission. You could also have a bad fuel pump, plugged fuel filter or a host of other problems. Is the service engine soon light on? If so have the codes read and that may give you an idea of what is happening.

No, the light isn't on, I think it is the Transmission, What do I do to Fix it?

Make sure the fluid level is ok. If not add the correct amount of proper fluid type. If the fluid is OK then take it to a shop and have it diagnosed. It could be as simple as a bad vacuum modulator or solenoid. If they say the tranny is bad then the only thing you can do is rebuild or replace it.