I drove 1,078 highway miles this past week & 3 times during my drives the transmission shifted out of gear & the engine revved up to around 6,500 rpm like it was in neutral. The first 2 times I let off the gas pedal & once the revs dropped it shifted back into gear with a jolt. The 3rd time it popped out of gear I floored the gas pedal & it revved to redline but didn't shift so I let off the gas & once again it shifted back into gear. Each time it did this I was cruising 65-70 mph & gradually pressing down on the gas pedal to either maintain speed on an incline or pass someone. It's a 2009 that I bought new & it now has 16,023 miles. I checked the ATF fluid level when hot & in neutral & it's 1/2 inch above the 4th highest pinhole on the dipstick which I would think would be fine. I'll take the car to the dealer this week but I want to learn all I can before I do. Anyone else experience this?