Hi can anyone tell me what would be the cause of the problem im having. During the cold climate only. Between 20-40 km/h my truck wont shift especially on an incline. Once I get to a straight road then it suddenly jerks and then picks up speed. After that its all fine. There is no dash lights on. I asked the dealer and they told me its normal to not have pickup. I told them its not normal to not have power in gear 2.