2020 TIFFIN ALLEGRO RED Steering Problems

I HAVE A 2020 TIFFIN MOTORHOME W/360 ENGINE ON A FRIEGHTLINGER CHASSIS. SHORTLY AFTER PURCHASE, HAD LOUD GRINDING AND FLUID NOISE EVERY TIME I MADE LEFT OR RIGHT TURN. SOUNDS EXACTY LIKE A VEHICLE W/NO OR LOW STEERING FLUID. IN FREIGHLINE SHOP IN SACRAMENTO, CA FOR TWO MONTHS THEY CHANGED STEERING GEAR BOX TWICE AND ON THE THIRD TIME TOOK GEAR BOX OFF AGAIN TOOK GEAR OUT AND SENT BACK TO MFG. ALONG W/TECH. RETURNED W/GEAR SAME PROBLEM. CHANGED POWER STEERING PUMP AND ALL LINES AND FITTINGS---SAME I WAS TOLD TO PICK UP COACH AND THEY MAY GET BACK TO ME---NOT SO [XXX] OF FRIEGHTLINER HAS TOLD ME HE WOULD KEEP IN INFORMED [XXX] NEVER A CALL BACK. [XXX] OF SACRAMENTO [XXX] MGR WILL KNOW ALL THE WORK THAT WAS DONE AND IS STILL THE SAME AS THE DAY IT WENT TO THE SHOP. MY VIN [XXX] --ON LINE FORUMS...