http://chevy.oldcarmanualproject.com/shop/1938/38csm106.html

What is the cap(secured by cotter pin) in the top image of the enclosed drive shaft? As I remove the sources of noise, I hear others so I checked fluid in tranny and rear end, both are topped off.
Thank you
Michael
38 Town Sedan

That is a vent

Thank you. No lubing the driveshaft other than keeping the tranny and rear full?

It is advisable to keep that vent clear. When I do the regular oil and filter change part of the procedure is to clear any of those on the car.
Tony

There is a plug at the back of the tranny that is to lube the U-joint. The Filling Station has a tech letter on it until I read it I had know idea.


The Honer

Thee U joint is automatically lubed from the transmission. If the U joint ball is split you can pre lube the Ujoint by removing that plug other wise it is unnecessary to remove the plug.