My Equil-i-zer brand hitch says it's OK to grease the friction surfaces. It says doing this is "optional" and will not diminish the sway control properties, and, it might quiet the hitch.
If you notice the pressure that's exerted on the brackets, I think that's what does the most for sway control.
But the noise IS kind of nerve wracking at first. Sounds like something is breaking, doesn't it?
- Jack
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