Years ago I bought some new drop links and decided to remove the rubbers to inspect them before fitting. The manufacturer had put a small blob of grease on each end but the grease was on the bar not the ball/socket. They were relying on it working itself into the ball/socket with use. That may never have happened and even if it did eventually work its way in how long would there have been metal to metal contact before the grease was distributed? Now I always check them before fitting.
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