Jerry, I think you could use a better grease, like the
Lucas "Red and Tacky" a higher temp grease, formulated
with extreme pressure additives, and also tacky, here:
The water-resistant Lucas Oil 14 oz. Red 'N' Tacky Grease, fortified with rust and oxidation inhibitors. It makes a great choice for use in many agricultural, automotive, industrial and marine applications.
www.homedepot.com
Remember to put grease under the flange.