transmission problem?

[drc4423]

2003 g35, car only has 60,000 miles on, previous owner kept really good care of it, but recently when driving and hitting the gas the rpms jump, but the mphs aren't catching up and when it hits 40mph the speed just stays. Even when you press the gas as hard as you can the engine revs but nothing happens, the front of the car shakes and jolts a little bit. You have to let go of the gas pedal and keep trying. Seems like the gas isn't reaching the whole engine, too much oxygen, computer chip problem? Anyone else have this problem?

[Poyzinous]

are you saying you can't drive faster than 40? Like there's no acceleration after that? its gradual? or sudden?
???

[tollboothwilley]

No CEL ?

You should have your codes read to see if there are any *PENDING* engine codes.