Hi. I have a 2002 Ford Ranger 4x4 with 167,000 miles on it. Lately it has been jerking when I stop and when I take off. My dealer can't seem to find the problem. At first they thought it was the box moving but that has been tightened before and the problem came back. Does anyone know what the problem could be. It was damaged in a hit/run collision a couple years ago and a rebuilt transfer case was put in it. We've had problem after problem ever since with this problem being the latest. I really like this truck. Thanks.