I replaced the catalytic converter (180 bucks) at 125k miles and also the Oxygen sensor (90 bucks) at the same time. I replaced the brakes and plugs and wires. Also the gear shift knob kinda fell off. So overdrive does not work, which doesn't matter b/c I never use it anyway.
This vehicle has been super dependable. It starts very easily. Great cab room. 4X4 works very well when I used it in the snow. I pulled several people out of ditches in the snow. One thing I do not understand is why Dodge made the V6 engine a 4 speed. Because of that, I get 14-16 miles a gallon, and it does not accelerate very well on the interstate. But I still love my truck, although I need to get a more fuel efficient vehicle so if anyone is interested I will be selling it for around $7,000 as of November 14, 2004 My cell is 864-915-4281 if anyone is interested.
Part of the reason why your mileage is so bad is because you haven't fixed the Overdrive button... Get the Overdrive working and your MPG will definitely improve.