See below in bold
Thank you so much for sharing this information here. I’m a newbie to Turing and find this VERY helpful. A few comments/questions:
1. Curious why you chose to do a WDH and air shocks. I understood from other posts that one or the other is all one needs to level things out. If that is correct, it seems like air shocks are a safer bet since they do not affect the frame. Is that a trainable conclusion. Though both help level off the vehicle, the air bags do not push more weight to the front, which you want for added steering. They are simply to help reduce sag. Think of it as reducing the distance the suspension can travel while still have some cushioning capabilities. watch the video I posted in a previous post on the difference.
2. If one has air shocks (with no WDH), would a friction bar provide sufficient sway control? I’ve heard of people having two friction bars one on either side of the ball on the receiver. Does that make sense or would two fight each other? Air bags will not provide any sway control, again just to help raise the back. 1 sway bar or two will depend on the length of trailer. I believe any trailer above 25' needs two sway bars. But that doesn't matter for you because you shouldn't be towing a 25'+ trailer with an Atlas, WDH or not. Your choice if you want to use a (1) sway bar, but if you use a WDH and pulling a small trailer <4000lbs you probably dont need sway conrol unless youre going through very windy conditions or speed.
3. One trailer dealer here told me that VW says no WDH because of the unibody frame but the very same dealer told me that his SUV is also a unibody frame and he used a WDH on his with no problems. Have you heard similar stories? that's the argument right now, some manufactures say its ok to use WDH, others say don't and all on a unibody. VW says not to use WDH on the Atlas, but wont say why (hitch, unibody etc), some believe this is a rule that comes over from Europe where they don't allow WDH. The Toureg is also unibody and people have been using WDH on that for a long time with no issues (albeit different platform). Use the info on here and make the decision you're most comfortable with.
4. A very experience welding/trailer dealer here told me that a WDH is fine as long as its spring bars are rated no more than the tongue weight of the factory hitch (a little less would be ok as well but never any more) because higher rated spring bars could just pull the low row of bolts on the factory hitch off the SUV’s frame. Does that make sense or sound like nonsense? Yes that makes sense, the spring bars provide the flex and allow some say when required. No matter what your WDH should be sized properly, not too big and not too small. Also set up to manufactures recommendations.
Thanks again for sharing your experience.