The front u-joint gets lubricated from the transmission. That grease nipple is apparently on the rear u-joint ball. The 1938 Shop manual page addressing u-joint lubrication starts on this page and continues on the next. It does say not to use fibrous grease in that nipple.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.