The boot is designed to keep grease in and dirt out. If you leak the grease and take in dirt, it will cause premature wear to the joint. If the joint becomes bad, you will hear a clicking sound when turning the wheel.
If the joint is bad, it can be dangerous. I would recommend getting a second opinion for cost reason. The boot is about 50 dollars and around 2 hours labor. 700 sounds really high.
Saturday, February 28th, 2009 AT 2:38 PM