I think that the shift collar in the front axle is stuck on the splines due to lack of lubrication. I had a similar problem on my 86 Cherokee XJ. I have worked out a repair procedure. I will gladly send it to you if you would e mail me.
A forum community dedicated to all off road vehicle owners and enthusiasts. Come join the discussion about performance, engine swaps, modifications, classifieds, troubleshooting, maintenance, and more!