First generation Pathys are great vehicles and very capable wheelers. Mine has seen a LOT of trail time and I'd be more than happy to share what I know about them. All you need is longer shocks and sway bar disconnects for this much flex:
The four link rear suspension with coils works very well off road and is also the reason they ride so much better than nearly any other SUV of their time. I'm running 33-10.5-15 BFG KOs with no lift and no metal trimmed though the rear arches are rolled.
The most common problem with them is automatic transmission failure. This generally occurs because the fluid is never changed and the cooler in the radiator plugs up. Bypassing the stock cooler and running an aftermarket one is highly recommended for ALL vehicles with automatics and especially 4x4s! Another thing that I think contributes to transmission failures is overheating the engine. It does not occur to most people that with a stock in-the-radiator transmission heat exchanger when you overheat the engine you may overheat the transmission and you certainly damage the transmission fluid.
If you get a Pathy I highly recommend getting an SE model that came stock with 31-10.5-15 tires. Most of these trucks have 4.6 gears, rear LSD, and rear disc brakes stock. Mine is an '88 that came so-equipped. It is mechanically stock except for the heavy duty automatic trans. sourced from an '01 Xterra.
The definitive source for information on Pathfinders is the forum at NPORA, the Nissan Pathfinder Off Road Association:
http://www.nissanpathfinders.net My user name is the same there as here, feel free to look me up.
There are videos from some of my Pathy adventures here:
http://www.youtube.com/user/Mister510?feature=mhum