Review on Mission Automotive Hitch Tightener Hitches by Marc Stewart

This is what you need, it's worth it even if you have a little play in the clutch. I have a motorcycle rack on the back of my RV with a Class IV 2" hitch. The bike weighs 300 pounds and the rack probably weighs another 80 pounds. This device eliminates all vibrations. The only downside is that you have to remove this device. before you can unhook anything connected to the hitch, which doesn't matter in my case. I used some Loctite on the threads just in case, although it comes with flat washers and lock washers.