My brother was driving his truck in the mountains and he got high centered. He was messing with the 4x4 knob or something and now its not shifting into high 4x4 and he got under it and manually moved it into 4 high. But he says that its starts going and then it slips back into low.
What should he check? Says it isn't sticking into high 4x4. Thanks for all your help in advance.
D.L. Man