It sounds like it's staying in second gear. That would make it feel like it has no power. If it goes to second gear right after it shifts to a new gear, it is likely slippage in one of the clutch packs inside the transmission. That is fairly serious.
If you find it starts out in second gear right after starting the engine, it is more likely to be a problem with a sensor. A sensor can go bad anytime, and is relatively minor.
Either way, there should be a diagnostic fault code memorized in the Transmission Computer. Have that code read by a mechanic. That will lead to the circuit or system with the problem, not necessarily the bad part.
Thursday, March 11th, 2010 AT 9:35 PM