I'm new to the XJ. Just picked it up a week or so ago. The 4 wheel drive is "intermittent" at best, or doesn't work at all. I don't think 4 low ever worked, but 4 hi did for a few runs.

I put it on stands and it shifts into 4 hi, and the shaft is running to the front axle, but the wheels ain't turning.

All info is appreciated!

1990 Cherokee Laredo, 4.0 straight six. Auto trans, Transfer case and axles unknown.

Also, advise me on a cheap, easy way to lock the rear end. This Jeep is pretty much off-road only, so I'm not worried about street performance. I've got a 73 Commando with a spool I've been driving for years, so I'm used to it.