Checkng with the dealer would be a good idea. But may well be nothing really wrong with it. Not familiar with the Curt. But my previous Pulrite Super 5th and and my current Reese Elite both had about 1/8" play where the top cradle (that rocks side to side) mounted on a shaft to the base. If I pushed forward and pulled back on the cradle, it would slide that small amount. Doesn't sound like much, but when having 13-14,000 lbs doing the push/pull every time I started/stopped it clunked. The Pulrite had a nut to tighten to take the gap out. The Reese is fully welded so I had to slip a plastic disc into the gap to close it up.