I've read in several discussions many are using the blue ox tiger track and are reporting positive outcomes. I just received mine today and will try to install tomorrow or Friday. There are other brands available and are designed similar. Most I've seen have a plate that bolts to rear end housing and has a bar ( yes most are round but a square one would probably work just as well) that connects to another bracket that attaches to the frame. Most posts Ive read people have reported significant reduction in rocking and swaying. This is why I decided to invest in one after still not satisfied with handling after installing safe t plus steering shock and doing cheap handling fix. Although significant improvement was noted with the previous two modifications. Hope this feedback helps.
2013 Georgetown 378 XL