Ya its not so much efficeincy between the two its just the different standards of making them between than and now. Newer ones youll often see only about half the metal housing as compared to old for one example. So the depth and what not has been changed due to cost to produce them and technology/design between than and now. Least that is my understanding.
Occasionaly youll see people double up the new seals where there is more than enough space such as some transmission or axles seals. Its all just a matter of personal opinion.
-Jordan
This post was edited by J.J. from Afton at 00:22:13 09/26/09.
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