I drive with a very "light foot" in order to get the best gas mileage (34 MPG). When I am slowly getting up to speed on a slight upgrade - when I get near 40 MPH, the car shifts into drive and it feels like the engine is "lugging" before it shifts back down. It's like the transmission is locked. If I give it a little more gas, it shifts down and the "lugging" stops. Is this normal operation?
---MIKE---