Noticed that the X was making squicking noises when i go over a speed bump or imprefections in the road. I could hear it on the driver side for about a month and now the passanger side is making the same noise. I am thinking it is the bushings on the suspension. Can i just squirt some silicone grease on them, or how hard is it to install new bushings. Or if it is not the bushing then what could it be. Please help.