Dodge Ram Van Forum : “Is a 1991 Ram 1500 Van a half ton or quarter ton?”

Is a 1991 Ram 1500 Van a half ton or quarter ton?

My friend's mom has a 1991 Doge Ram 1500 van. It shakes really bad when she's driving it and doesn't know what's wrong. A friend told her it was either the U-joints or the ball joints. She wants to sell me the van, but in order to find out which parts I need, I need to know if it's a half ton or quarter ton van. Can you help???