I had my transmission replaces 1 year ago. Now when it's cold I put it in gear and step on the gas and it doesn't go anywhere for a few seconds and when I go up hills at all it tries to cut out and I usually have to put it in 1st for it to make it. It's been going on for about 4 months and lately when I'm driving along and brake for a minute and try to accelerate again it cuts out for a few seconds. I just push on the gas harder and it goes again