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Originally Posted by gordo
I agree you would be better off in low but you could very well have a bad VC in your transfer case. Hard to say but when I had the same problem in my 89 that is what it turned out to be. Thankfully you can just remove a driveshaft to check it. If the truck wont move your VC is toasted. It it is like mine it sounded like someone put marbles in my tcase. When both shafts were attached it worked fine and was quiet. If your VC is okay then it should drive perfectly normal. One assumption is that your RRC is 89 or later. This wouldnt apply to an 87-88 with a LT230 TC. Gordo
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Usually when Viscous Couplings fail, they fail frozen. Meaning they allow no slip and are effectively "locked". This causes tire scrubbing, bad cornering, and drive train wind-up. I haven't heard of them failing loose like that, but it's certainly possible.
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i got stuck 3 times mostly because my tires dont have good tread but i noticed when i was stuck that my front tires wouldnt spin at all...i had it in low gear on the regular shifter but the small gear shifter is stuck so i dont use it and i dont know if thats the reason the front wheels werent pulling...otherwise i guess my 4 wheel drive doesnt work?
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It's possible you were only looking at one side of the vehicle. With open front and rear differentials, you really only have 2 wheel drive. As long as 1 front wheel and 1 back wheel are spinning, your 4 wheel drive system is working properly.
As for the front shifter, your truck is always in 4 wheel drive. That front shifter (transfer case) just changes your gear ratios. This gives you more control off-road. It also puts less stress on the engine.
