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Old 06-03-2020, 08:42 PM   #8
Daves55Sedan
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Join Date: May 2010
Location: Granite City, Illinois
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Default Re: 55 F100 U Joints

Bear in mind, the splined output shaft of your transmission should be thoroughly greased, because that yoke will slide back and forth on the shaft as you go over bumps or load down the bed of the truck.
If that metal plug is gone, you will fairly quickly push the grease out thru the hole you just made. That plug, keeps the grease in.
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