If you don't want to buy a gallon (or two gallons), the SM318 takes a total of 1 quart, 1/2 pint in the u-joint ball area and the rest in the regular fill plug. I have found GL-4 in quarts Sta-Lube Brand and Triax Brand (pics.) I think I got both from Amazon.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 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.