I had the same problem with my wife's 2000 Amigo when we first got it. For me, the fix was to match tires exactly, (I had replaced the front set with new - same size, same brand etc..) the difference between the new & used would make enough of a bind that the transfercase would pop out of gear & into neutral.. In my case I had to replace the back set too so they were all exactly the same size & it fixed it. I could have probably put one new in front & one new in back & let the spiders take up the difference so the transfercase wouldn't have to & it probbaly would have worked too but I chose to just have all new..