Have you drained your differentials?
Posted: Tue Oct 24, 2006 5:16 am
It is possible that your CCKW still may have WWII or 40s era gear oil in the differentials. It does go bad with time, many of the WWII seals were leather, and if there is any moisture or contamination in the GO, it will shorten the life of those 60 year old seals.