 Sometimes you can leave fluid in a transfer case too long, and if it thickens up, it can actually cause stuff in the transfer case to start sticking. Right, Marty? Yeah. It looks like that era vehicle only has the one motor on the transfer case that engages the four-wheel drive. So, yeah, you could try a transfer case service, and that might solve the problem. Yeah, a lot of things that simple could cause you to have a delayed reaction.