Sounds like the gear pack near the motor. I had the same problem and had to cut a flap in the coroplast to get it lubed. I understand there is a place on the frame you can drill a hole and get there also but it just seemed easier to cut plastic.
Unit may need to be adjusted to level. Check how it sits when in. There is a manual on the slide that tells how to check and adjust. If only 6 months old should be able to get covered by warranty.
2019 Rockwood 2608BSD 2019 F250 4x4 6.2
ďLife should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming "Wow! What a Ride!Ē - Hunter S. Thompson, The Proud Highway: Saga of a Desperate Southern Gentleman, 1955-1967