Valve troubles especially the jet valves.
The vehicle tends to rust badly, especially underneath.
The tail lights failed due to corroded wiring.
The fuel pump quit (the dealer could not tell me if the pump was in the tank or on the block!- it was in the tank).
The engine is the weak point as it is generally unreliable and under powered.
The four wheel drive system is awesome and will take you almost anywhere. It pulls and tows good for a small truck.
I own one also and agree with comments.Found that the head off a Dodge 600 2.6L is the same!! Mine runs fine now that the Jet valves are gone.