One problem related to vehicle shudder has been reported for the 2001 Dodge Ram 1500. The most recently reported issues are listed below.
Driving down the highway at approximately 70 miles per hour, I heard a horrible rattling noise. Vehicle started to shake violently, I was able to pull over to the side of the road. Upon inspection the rear driveline pinion yoke was loose with the nut holding by one thread. . I installed a new nut and inspected for further damage.