If a car sound good and idles but when put in gear will only move slow until it dies can this be transmission problem?
Yes, that's a strong indication of a transmission problem. If the engine runs fine in idle but the car struggles to move or dies when put in gear, the transmission isn't properly transferring the engine's power to the wheels. This could be due to a variety of issues within the transmission, such as low fluid, a failing clutch (in manual transmissions), worn internal components, or a serious internal failure. You should have a qualified mechanic diagnose the specific problem.