When I am driving at 30 to 40 mph on the highway, the display will change from H (high) to R (reverse). It does not actually shift into reverse, it seems to shift into neutral and starts losing speed and the gas pedal has no effect. After the rpm/speed drops for 5 seconds or so, it changes back to H and runs fine for another minute or so. You have to try to drive it at less than 5000 rpm or so, to try and keep this from happening. Any ideas on what the problem might be? It only happens at the higher speeds.
