Morning!
My '88 GWagoneer has developed a chain noise, or almost gravelly metallic sound when I'm running in 2wd. The sound immediately disappears when I shift into 4wd Hi and I can run with no noise. The dash light flickers (4WD) when I'm in 2WD, but keeps a solid light in 4WD. I hoping that I can get some insight from the board here on how to diagnose the issue and get it fixed. I've checked the vacuum lines and they are good, and actually had a known good vac switch (on dash) that I've popped in. No fix.