While flooring it, engine/transmission, well, the car just studders somehwere in mid rpm range for a short time, then accelerates on just fine... been doing this since i bought the car at 38K, now has 54K and is out of warranty. Problem has not progressed any. Transmission fluid changed @ 40K, but was experiencing the problem beforehand. Any reccomendations? Could it be my spark plugs or plug wires?