First, is it locked for use like a regular 5th wheel or are you using the universal wedge to activate the pivot back 22" from the pin? IF you are using the universal factory wedge, get one that is special made for your hitch. DO NOT lube the rear pivot shaft. When you are turned as far as you can, spray the flat surfaces with lithium grease, turn maximum the other way and spray some more. Mine made some noise until the two guys from Reese that actually designed it pulled mine apart, cleaned it and lubed the flat plates. They stated very emphatically DO NOT LUBE THE PIVOT TUBE. I can't turn mine by hand, but some folks can, I don't want it to turn easy as it would be a major PITA if you are hitching at an angle or slightly off center. ALSO, if you are activating the rear pivot, DO NOT USE a Teflon plate on the hitch.
BTW, mine hasn't made a sound since the guys in Goshen cleaned and lubed it.