alignment and ball joints
2006 Ram 1500 4.7, 4 door, 4x4, 35,000 miles. Took it in for an alignment and was told that the left upper ball joint is loose. They wanted to only replace the upper. Shouldn't both upper and lower be replaced? That's always been my practice but I haven't owned a truck with so low miles before. Is it possible that the lower will still be ok because there's only 35,000 miles on it?