I'm looking into getting a new third member with support bracket. I saw you offer a package with a steel replacement diff bushing. What would be the benefit of replacing the stock rubber bushing with the steel one? Would it cause more vibration or road noise? I'm getting ready to add a supercharger so I'm trying to reinforce the rear end suspension a bit. I already have solid tubular lca's and lca relocation brackets and adj panhard bar. I re-used the stock upper which was a mistake because I am lowered 2 inches and am now getting a clunk from the rear when shifting.