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Universal joint?


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On further inspection, I'm not sure it is a ball and trunnion. It looks like a ujoint turned inside out. Instead of being driven by a cross through the center of the yokes, the yokes are in the center and the ujoint  surrounds them, driven by the ring. 

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There called Mechanics U joints. They are filled with oil. You turn the joint till one plug is high and one is low. Fill with gear oil threw the lower plug till it comes out the top one. Pump it in with a pistol grip oil can. 

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I take both filler screws out, pump straight STP oil treatment in upper hole, when you see clean lube coming out lower hole, close that up and fill upper 'till it's full. replace upper filler screw. Some old autos had a leather boot wired onto the universal to keep dirt out. Many are missing.

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