Dan, I have been dealing with yoke issues with mine to. There is a hole in the yoke so it can breath because there is an oring seal inside on the output shaft. Your yoke should be about 7 1/2 inches long from the center of the ujoint. If it`s only 5 1/2 your yoke will not extend to that oring and then it will not seal. No matter which one you have you can just seal that hole with JB weld then if it still leaks it probly getting past the press plug in the end, there again clean it up and put some JB weld on it or get a new yoke without a breather hole.