Post#2 » Sat Jan 09, 2010 8:37 am
I can't tell from the number what weight the oil is.
A GL5 gear oil that has a 75-90 Weight is right for those diffs.
Many of us use full synthetic gear oil in there rather than standard petroleum based oil. I think full synthetic oils protect the bearings and gears better and will help the components run cooler. Lower friction is good.
I can recommend Redline 75-90w hypoid gear oil for the axles.
Other synthetics like Agip or Amzoil or the synthetic blends would be excellent as well.
The oil that is called for by the book is SAE 90 Hypoid gear oil. The service sheet: 235
Oil technology has changed a lot since the service recommendations were made over 25 years ago.
-Dai