my shin is not favoring me leaving the hitch in place on truck.
i say that, but, i end up hooking up a trailer more often than not. from either hooking to trailer or tossing chain around to drag something.
i do have 2 trailers, and of course use different ball size. and some times easier to pull hitch out and toss onto ground, to make it easier to get pipe wrenches on ball and its nut. with cheater bars on them when needed.
i tend to min once a year maybe twice a year, pull hitch out, and give some grease to it all. so the hitch does not rust into place. once it is greased up you can tell there is some slop between hitch and receiver hitch on truck. but i have yet to notice rattling or issues. the grease also tends to help make it easier to pull out the hitch and put it back in. though it normally requires me greasing hitch up. pulling trailer for i don't know 15 minutes or more. so grease works into everything better. then normally some paper towels to wipe off any excess grease after the short trailer pull.
the time i grease hitch, is normally when i also grease all the jacks on trailers to keep them easy operating smoothly.
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i realize ya looking, to keep someone from steeling the hitch. but... *shrugs*
when ya find out you need to pull the hitch and it is rusted in tight. and ya toss a chain around a tree to hitch. and put pressure on it all. then give some taps with a hammer to get it loose and still nothing budges. *been there done that* spent more time jacking around getting rusted up hitch pulled, than i have spent all the time total greasing up the hitch.