2004 Dodge Ram PLEASE HELP - DEALER DOESN'T HAVE A CLUE

2004 Dodge Ram; 57,000 miles - Nov. 07 check engine light - to dealer, replaced o2 sensor. Nov. 07 - Check engine light again - To dealer who replaced Accelerator Sensor ($505). Got the truck back, seemed to run fine - A week later, back to dealer for bad wheel berring ($475). January 08, after truck warms up, whenever you are either stopping or just riding down the road, it starts sputtering, running really rough, ans shuts off - Once, have lost everything, including power steering - Towed to the dealer again Jan 08 - they couldn't get the truck to act up or a light to come on with them - said they 're-programmed the computer' - January 08 (two weeks later and here we go again!) - Back to dealer - Coming home from work at 3 a.M. Starts sputtering, running rough, shuts off and I nearly wrecked - Back to the dealer who says they replaced the computer in the truck. 2 days later, and still in January 2008, the same scenerio - On the way home from work starts running rough, though this time I am able to 'limp home', versus paying yet ANOTHER towing bill. As luck would have it, the warranty was up in Oct. 07 - I am at my wits' end, and don't know what to do now - It's a true hazard, but the dealer says they can't do anything 'unless a light comes on' - My husband wants to get rid of it, though I don't because it is so close to being paid off. This truck has never been put off the road, used for towing, etc. - It has been totally babied. PLEASE HELP! Thank you for your time.