HELP! Toy Hauler creeks, sounds like it's breaking in two!!

We are newbies to full time RVing. We head out permanently in about two weeks. We purchased a 2011 keystone fusion from PPL in Texas. At the time, they told us people did not test pull the rigs. So we purchased the rig and headed home to California. Upon getting home we found the rig to have serious issues with creaking, sounds of metal on metal, and just overall sounding like it was going to break in half. Especially when taking sharp turns, anytime it is in motion with short movements.. This is not our first experience pulling large trailers, we have owned living quarter horse trailers in the past and never heard anything like this. It's terrible!. They can be totally embarrassing at the gas station.

has anyone else had this issue? Is it shocks? Is it leave springs? Something needs lubricating? Any help would be greatly appreciated .,