My mother bought the car brand new off the showroom floor in '86. Once my parents got married, my dad used it as a work truck, then I took ownership in '99. I was still too young to even drive it, but it's what I wanted.
I gave it a desperately needed tune up, and ran it every day. I started using it as a daily driver in '04. Gets great mileage; 20+ in the city and 30+ highway. I have had a pretty big drop in fuel mileage though. I think it's just time for a rebuild, any other ideas will be appreciated. Throughout the life of the truck, here is what has been replaced/repaired/faulted:
Transmission - I sheared one of the dog teeth off-roading, and it got lodged in the gears. Replaced it with OE transmission and all is good.
Transfer case - Just because it came with the transmission, and I already had the old one off.
Front left brake caliper - Blew out on my dad a couple days after he had hit a good rut off-roading.
Handle on the e-brake broke - It's plastic and just got weak over the years.
Seat on driver's side exposing springs - started happening after my dad was rear-ended in it.
Carburetor rebuilt at 272000 miles - Was just old and needed it.
All in all, this truck is one of the most reliable trucks you could buy. I have been in many situations where I got through terrain that my friends in newer jeeps and trucks would get stuck in, and I would have to go back and help them out.
It's not a fast car... Well the two wheel drive version is relatively quick (my friend had one, didn't like to go under 90 mph with a Weber 2bbl carburetor on it). The 4x4 is not fast in any way however, but kills most cars in the off-road realm.