The Dana 25 (from 1949 or so) I opened up this weekend had Rzeppa joints in it, while the D27 (c1969) I also opened up had Cardan joints.
I looks like Walcks sells only the Cardan type, saying it replaces the "older" joints.
Isn't a Rzeppa joint better, being CV, than the Cardan? Why is the Cardan joint used on the newer axles?
-Paul