58K seems a bit light on mileage, but I guess the washboard roads comment explains that. Most people I talk to seem to get around 150K miles before changing out their ball joints (4X4). I got about 215K before I had mine changed out. I went with Dynatrac. I'm now at almost 229K and am very pleased. Ran me about $1200 for both sides, inc parts, front brake pads/rotors, and labor.