34studepres Posted December 14, 2015 Share Posted December 14, 2015 What weight of oil goes into the transmission on a 1925 Series 80?? Thanks in advance. tom griffith Link to comment Share on other sites More sharing options...
Grimy Posted December 14, 2015 Share Posted December 14, 2015 600-W AKA steam cylinder oil. Use this in the diff and the steering box, too. Get it from Model T and A Ford parts houses. Insist on the dark, smelly, viscous stuff, NOT the honey-colored stuff which I suspect is repackaged SAE 140. Speaking of the steering box, do not be deceived by the zerk fitting. Your car came with a pistol grip push-type small grease gun loaded with Pierce's "Special Compound"--which is 600-W. If you put even a lever-type grease gun on that zerk, you will blow the seals. If you don't have the "compressor, grease," unscrew the zerk and pour in some heated 600-W. Link to comment Share on other sites More sharing options...
34studepres Posted December 14, 2015 Author Share Posted December 14, 2015 Thank you for the very detailed reply. Very valuable information to have. Now I know what to do, and that may be a first! Tom Griffith 608-212-8774 Link to comment Share on other sites More sharing options...
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