Q: Is it hard to change ball joints?

Hi there - replacing ball joints usually requires specialized tools for pressing the old ball joints out, the new joints in, and tools for compressing and holding the vehicle spring, while the ball joint is replaced. From that standpoint, yes, it is hard to replace ball joints - more than basic DIYr skills and tools are required. There is also the safety dimension for being in close proximity to a suspended vehicle, and a compressed spring that has enough force to cause serious harm if it comes loose. I would recommend having your ball joints replaced by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.