When I pull out sometimes my truck doesnt shift until you red line it, then it shifts really hard. Then if your speed gets down to where the trans has to down shift it does this again . If you give it a lot of gas to almost redlinethen let off its like it has no power at all till you redline it to get it to shift. But whats funny is it doesnt do as much when you have more than a quarter of a tank. This gets really frustrating in slow traffic because you half to gas it to get it to shift than traffic is so slow it shifts back down and you have to lay back to get enough room to gas it again. What shouldI do.