QuestionA friend of mine has a 4WD truck, and in the recent bad weather (snow), her father placed the truck in 4WD mode (specifically 4-Lo, I think). Either way, she continued to drive her truck on the road in 4WD after the snow cleared. Today, the truck started to act up. While in drive,she could move at 5-10mph, and when she simply tapped her brakes, her rear-left tire immediately locked up. The truck seemed very jumpy, but at this point, I had taken it out of 4WD and placed it into 2-Hi on the gearbox. Another friend of hers pointed out that there might be something wrong with her rear-differential. What's your take on this? Thanks.
AnswerJoe,
With the information you have given me, I would check the brakes. It sounds like something broke or is stuck in the rear brake system. Possibly a bad or stuck brake cylinder.
Another chance is that something got in a bind (usually the transfer case), and has a failed component. Anytime you drive in 4WD on a hard surface this will place the transfer case will bind up and drive components will be extremely strained. Like I said, operating in 4WD on a solid surface usually breaks the transfer case.
Carl
