In The Shop
The Novak Guide to Dana 18 & 20 Gears Interchange 1941-1979
A strong attempt has been made to condense a tremendous amount of information into a coherent table, below. This chart's primary purpose is to assist individuals with interchange and compatibility information. All Dana 18 / 20 gears that are not spur cut teeth are cut on a ~30 degree, left-hand helix.