Here's what I've found so far. When cold, the car starts from a stop great, starts out in 2nd not 1st. When the car warms up, continues to start out in 2nd albeit extremely sluggish, bearly gets out of its own way. Stomp on it when warm, starts sluggish, down shifts to 1st then shifts to 2nd sending the kids tumbling into the back of the wagon (exagerating of course). The only kicker is that at times, when warm, starts out as if cold. I dunno.