pullin2 wrote:
I tow with a Hensley, which is similar to the ProPride (I think). I've had a similar issue and here's my story...
Like the OP, I was really pleased with the sway control of the Hensley but after a while it seemed to "push" just a little with passing semis. I put my GoPro on the tailgate and discovered my Hensley was off center when pulling on a straight stretch. Here is the video, you can see how it doesn't quite align once I'm on the highway (at about the 1:10 mark I accelerate straight down the highway).
Hensley Video
I called the Hensley folks and they advised adjusting the control arms (lengthen one, and shorten the other) by a few turns of the adjustment nut. I tried this and it aligned the hitch, and seemed to solve the minor "push" from winds and trucks. My WAG is that the trapezoidal relationship between truck/hitch wasn't straight, and with one side slightly "turned" it allowed wind effects from that side. This is my guess (not Hensley folks), but getting them perfectly aligned made it tow like my old fifth wheel.
I don't know whether any of this is useful to you, but I offer it as a possibility. Best of luck... once dialed-in, the Hensley completely solved the sway problems. I assume the ProPride works just as well.
Interesting! The Pro-Pride uses a yoke, rather than the control arms. It is shaped like an upside down "Y", with the single leg of the Y captured in a cross bar going across the A frame of the trailer. But, moving the cross bar right or left should have the same effect as changing the control arms. No camera, but if I find a quiet straightaway, and stop going straight, I should be able to get out and take a look at it.....