Lubricated by their own squeak

Germany during WWII was a remarkable hotbed of engineering. Almost all of their innovation during this time was, of course, in weapons; and most of this innovation was not as readily transferable to peacetime applications as other nations' wartime advances (like Great Britain's work in computers and radar, for example; or the US's work in atomic fission).
But many of their innovations were decades ahead of their time. Look at the Tiger tank, for example -- and how dissimilar it was from other tanks of the day, and how remarkably similar it is to tanks like the Abrams, still online today. Look at the Me262 fighter, and compare it to other planes of the day, and even to jets that came later (like early Sabres and MiGs). Even in small arms development, the Germans led the way with the first legitimate assault rifle.
But one of the more interesting advancements by the Germans wasn't so much a result of their technical ability as it was pure serendipity, and their inability to produce a sealed bearing that would survive the harsh environment of a tank tread. I've only ever found one reference to this anecdote, so it might well be spurious; but it has the ring of truth to it.
Apparently, the Germans had an issue with squeaky bearings in the Panzer tank tread. This wasn't a big problem, since the sound of the squeak was usually accompanied by the sound of the tank's massive diesel engine; but the Germans were concerned about bearing wear. When they looked into this, they found that they'd stumbled upon a bearing that didn't need lubrication -- the squeak was just the right frequency to cause physical separation between the two surfaces for a substantial amount of time, and when the two surfaces weren't in contact, coefficient of friction and wear both went to zero.
But again, like many of the German innovations of WWII, I'm not aware of any applications of this phenomenon in more constructive endeavors. If any readers know of any other uses of this acoustic lubrication, let me know.