Groaning during turns is often a sign of improper adjustment of the weight distributing hitch. Specifically, it will groan if the tips of the springbars are too high (too few chain links between the springbar tips and the lift hooks). There should be at least 6 or 7 chain links between the tips and the hooks. If there are fewer, it means that the ball mount is tilted too far forward, which raises the tips of the springbars too close to the hooks. If you have only 3 or 4 links, you really need to do an adjustment before you break something. WDH ballmounts, at least the ones that involve chain-type springbars, have a tilt adjustment. All you need is a BIG wrench, and the instructions for your WDH (available online).
It is easy to adjust, and not something to ignore. There is a little info around post #8 here
http://www.trailmanorowners.com/foru...ead.php?t=6549
and a little more in the posts around #10 here
http://www.trailmanorowners.com/foru...ad.php?p=35516
Bill