I have an 85 short bed silverado and the 4wd won't work. With the T-case shifter in 4 high on dirt I can spin the rear tires while holding the brakes, and just hitting the gas, only the rears spin. In 4 low, the truck is geared down, but still only the rears spin. I just changed the T-case fluid. What should I look for, or what could be the problem? Any help appreciated. Thanx...
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