Is the tie rod "joint" like a CV joint as far as grease packing is concerned? My driver side tie rod boot is torn & I put a "patch" over it - heavy gauge plastic with cable ties at each end. There didn't seem to be any grease leaking out. I know it doesn't turn like a CV joint boot. What exactly is the boot protecting? As long as my patch stays intact am I running any risks by leaving it alone? I'm already aware that to replace it the tie rod must be disconnected & there will be an alignment needed. Thanks.