After the Rubicon run my rear bumper was feeling shaky and tightening it didn't help much. I ended up getting the GenRight 3/16" rear crossmember plate and inner reinforcement plate. Installation wasn't hard but it was time consuming having to remove the bumper and drop the gas tank. It did give me the opportunity to pound a dimple in the gas tank skid where the diff would occasionally hit on a hard bounce. I'll find out on the next run if that gives it enough room now. The bumper feels solid again!

Here's the new crossmember plate...

And the extra space between the diff and skid...