jsdad...adding to my post, I set an afternoon aside just to go through the Equal-i-zer set-up procedure. I closely read the instructions, I watched the company website video and I read the directions again. I painstakingly went through each step while re-reading the instructions, attaching and then disconnecting the trailer, measuring wheel well-top height each time, adding a washer to the hitch and rechecking until it all came together. This was after my dealer had set it up...not taking enough time or attention.
And, as others have recommended, I run near max. tire pressure when loaded.
Good luck!