The E2 by Fastaway uses ball and socket and the Equalizer uses a pivot bolt, just to be clear. Both manuals and how-to videos say to applying grease to these areas only. Not one shows applying grease to the bar ends at the L brackets, its only mentioned deep in the manuals as being optional to reduce noise.
You guys who think the GREASED trunnion knuckle end does much of anything in regards to sway control are off your rockers!
First, take a look at every stand alone anti-sway device out there. Do any rely on a ball & socket, pivot bolt, or anti-rotation of any type to induce friction. No. They use them for connecting points, not to create friction. Same deal on these two hitch designs.
Don't get me wrong, there is friction at knuckle, and this is what marketing claims to add to sway resistance. But friction is VERY low in comparison. These free moving, pivoting joints are simply not used in any design to create friction when needed. ESPECIALLY WHEN GREASED!
Common sense tells you where the friction is at. Just look at the wear marks on the hitch. The majority of wear is found on the bars where they meet the L brackets. At the ball/knuckle end, where most of us are applying grease, there are marks and indications, but nothing to get excited about. We just keep the area clean and reapply a thin layer of grease.
The L brackets is where the major friction and sway resistance is occurring on these two WHD's, not the trunnion knuckle/ball end. Period.