The upward pressure on the underside of the hitch head from the WD bar socket tension is the main sway control. The downward pressure on the L brackets from the WD bars is the secondary point of sway control.
You can lubricate the bars sockets where they contact the hitch head if you wish but it will reduce the amount of sway control a bit but will also reduce the noice from the hitch when turning.
Same goes for the L brackets although Equal-i-Zer sells a pad to put on the L bracket to reduce noise.
Most people just put up with the noise as it lets them know the hitch is working.
As far as the brackets moving goes - they should not move if you have the bracket set so the bars rest squarely on them and are not at an angle. The bars should slide smoothly and evenly on the surface of the L bracket. If the bars are angled upwards then they will contact the front edge of the L bracket and possibly cause the bracket to get pushed backward during a turn. This condition will also reduce the amount of sway control a bit.
Barney
