I am wondering. Since the truck has a 12 inch lift. I have a Dana Rear end. If the main pinion is not getting enough oil. I have heard that if that is the case if would also cause the truck to shift hard from 2nd to 3rd, anyone else heard this. One more thing Were is the speed sensor located. I want to make sure there is no metal on it. Since if there is is, this also might cause the transmission to shift hard.