Hi, Was out 4x4 and got stuck. When I got out and looked at my truck, I noticed that only my right real wheel was spinning, even though I had pressed the 4x4 button. I can hear it connect, yet still no power to the other three wheels. Why?
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Re: 2001 Suburban 4x4 will not connect
4x4 is not all wheel drive. You still have differentials that will only allow one wheel to direct power most of the time, unless you have posi diffs. Many times you can have one front and one back wheel spinning, even though you are in 4 wheel drive, but you should have had one front wheel spinning as well as the back one when you were stuck. Possibly the one on the other side of the truck was spinning.
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One thing I can think of is that the steering gearbox adjustment is too far from the pinion and needs to be tighter. But then your mechanic would have known this and reset it. Only other thing could be that you have the incorrect backset in your front wheels and that would make the vehicle squirly at speed. That happened to me when the wheels I stuck on my vehicle were outset too much. Other than that, only other thing is there is no toe in on the front end. Without a certain degree of toe-in, there's no drag at all and the tires will flop from left to right at will.
does the shake come and go at different speeds? check your tie rod ends by lifting the front wheels off the ground and grab the tire and shake from left to right. if they are tight you probbably need to replace the rotors
your 4x4 electronic control switch may have gone out and that is why it is stuck in that gear it is located on the transfer case i beleave its on the right side its black with a couple screws holding it and wire coming from it but i may be wronge and it could be on the left been a while since i had to change one