The inside of the hard rubber bushing, which is the inner part that wraps around the bar, it hardens over time, when it creates enough space/slack, it will start making a mild thumping sound when the front end travels slowly over uneven surfaces. The bracket and the bushings are stationary and the bar bangs around. Note the bolts holding the brackets through, are long, to the point you think it's Christmas before it comes out. Clean the dirt up around the bar where the bushings clamps down and a smear of silicon lube all inside the bushings. Grease the thread on the bolts. Some of the brackets bolts are more easily managed from the top, with long extensions and a swivel. The DCCV needs to be moved slightly out of the way. It has two bolts, only one needs to come completely out, the other, I think it was the top one, only needs to be loosened as the DCCV bracket is hooked around it. As you loosen the bolt a few turns, the DCCV on it's bracket can be lifted up and around away from the bolt.