So yesterday, sitting at a red light, light turns green, I lightly press on the gas. Vehicle shutters and then i feel a thud. Make my turn and am pressing on the gas, RPM's are rising but barely any power. Make it back to my office. Call the dealership. They're about 2 miles away. Go to drive it to them, barely make it there. Feels like its not engaging, shutters at every gear shift. Any ideas what could be wrong? Waiting to hear back from the dealership now. Mileage is 55,004. So should be covered under powertrain warranty but truck is lifted so not positive.