What does the epc call this part? Considering how tightly the bearing is held into the bushing and the ease with which the sleeve goes on and off, I figured it's function was as a water slinger to keep water out of the bearing.

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1981 300TD 310k miles
1970 280sel 172k miles
1966 230 Fintail 162k miles

"Where are we going? And why am I in this hand basket?"