I have a 2001 4dr Explorer, 2wd, auto trans, 4.0L SOHC V6. I'ver owned the truck for about 4 months and have the following to say about it:
1. I Really like it
2. Timing chains are a big problem with this engine and are very expensive to replace, even if you do it yourself.
3. I've read that the auto transmissions are not that reliable
4. The ride is firm but okay with the right shocks
5. Fuel milage is not good and about the same for V6 and V8 17-18 avr is considered good.
6. Minor problems are common: Intake seals, IAC valve, rusted in spark plugs in northern states, door handles and locks, rear wiper problems, vacuum leaks.
Still, I got a good deal and I'm happy with the truck.