when car is cold, it will not shift. I have to do it manually by pushing the gear shift into neutral and then back to drive to get it to shift. After the car is warmed up, it shifts fine thru all gears. The volvo dealer is telling us we need a new transmission, of course!! We disagree completely because it has run fine until it got cold. Changed the transmission fluid, but did not flush it. The pan only holds one gallon, and the manual calls for two. Any help?