Got a '95 5spd Rio Grande that I've been working on for two months now. Just found out 4WD isn't working. When you put it in 4 lo, it pops out and goes into neutral the second you start to drive. It'll go into 4 hi, but 4WD isn't working.
I've been reading up on this issue, and I first replaced the vacuum switch. Not that. I have a Posi-loc fix that I'm trying next, but I have a funny feeling it's not just the vacuum system.
Any advice? I'll get a transfer case if that's what I need, I just am trying to figure out if I need a whole NEW case, or if it's probably just something in the case itself.