I have an 04' Ranger 2wd with the 2.3 and Auto trans. When I'm on the freeway cruising around 65 in overdrive and I give just a little more gas to accelerate and the RPMs raise up there is a short vibration but it goes away as soon as the RPMs go up. But if I get on the gas hard in the same situation it will not do the vibration. And this only happens when I'm on the freeway, not driving around town.

Anybody had this happen to them before? It feels like its coming from the trans but I don't know if its inside or if maybe the mount is bad or what. Any help is greatly appreciated!

Robbie