I have a 1998 dodge 2500 ram 4x4 pickup...well since i have own this truck went to use the 4x4 , just pulling out of my drive way, i put it in 4 wheel drive (shifter) the 4 wheel drive would not engage right away. all i would do is spin.. so i tried to put it in 4 high also still nothing so i would try to keep trying to back up or go forward and still it would not engage.. so i noticed only time it will engage into 4 wheel if i am only moving driving down the road then it will engage,, so any one who can help me figure this out would be much help. thanks