12K Equalizer here too. I greased the square slots on the hitch as well as the "L" plated and clips to minimize the noise. Did this on my own behalf as noise was horrible. Last month my DW came home from work (she works for our TT dealer) and asked if I was greasing the system, as Equalizer had a warranty claim of the sway bars wearing. This occurred on 1 round trip from Illinois to Washington state.
One note to mention...I don't "slather" it on. I used it according. The grease I'm using us a green high temp grease I bought at Autozone, a couple years back (I thought it was by "Two Guys Garage...something like that).
2007 Ford F250 4x4 Harley-Davidson Powerstroke
2006 Cedar Creek Silverback - 35 LRLBS
(2012 -11) (2013 - 10 so far)