I went and looked at a 98 5.9 4x4 today. It was really nice inside and out. Comfy, and accelerated strong and smooth. But, the idle seemed to be a little random where it would stay. sometimes 1100 for about 15 seconds, then down to around 700 for 20 seconds, then 850 for 12 seconds, etc etc. That itself wasnt what put me off of buying it, it was when I tried the 4wd. It wouldnt stay in 4x4. I dont know enough about transfer cases to know if it was a small easy fix or a bigger more expensive fix.