One problem related to steering failed has been reported for the 2007 Dodge Ram 2500. The most recently reported issues are listed below.
2000 miles ago as I was driving down the freeway the truck began to pull to the right and handled as if there was some broken linkage or steering box was failing. After inspecting and not finding anything wrong, I continued my trek home and couldn't comfortably go above 30 mph, it almost felt like half of the front axle was locked in 4wd. Searched online and saw that seized rear brake calipers are not uncommon so I replaced the rotors, calipers, and pads. Made several short trips and thought it was resolved. During a 1 hour drive the problem returned and I was unable to control vehicle and stopped to inspect. The brakes were not hot but the rear axle was binding badly, I limped the truck home, afraid to drive it again. As I have been doing research on the problem, the internet forums revealed many peoples stories about Dodge ram axles "locking/seizing" while driving down the freeway causing accidents and roll-overs. Just thought you might want to look into it. Thanks, signed an immaculately cared for and broken Dodge ram :(.