have a 2001 Durango with the 4.7 (regular, not HO). It recently had a tranny rebuild done (line pressure solenoid went bad) about 450 miles ago. It isn't hesitating and shuddering when shifting into third now, but I notice when I hammer the throttle and get up to higher speeds and higher RPM's (anywhere between 65-80 mph and 2700-4500 RPM), sometimes I feel a slight jerking, and a very slight stutter from the engine, that just lasts a second, but it does keep on happening. My speed and RPM's keep climbing in spite of this. It gets better when I ease off the throttle and let the RPM's fall. Could it be the transmission? It almost feels like it wants to shift but something isn't letting it until I ease off the gas. Maybe my tires are skipping? Or might it be something with the engine? Any help is appreciated.