it could be loose bolts on the brackets or the bushings with the rubber inserts could be shot. Sometimes all you need to do is tighten up all the bolts and you're ok. If it's the bushings, it's a bit more work. You'll need a hex head adapter for your ratchet extension as the allen head bolts are in a hard to reach spot. If these are shot and you replace them, your shifting will be nice and smootha again.