Rear Diff fill hole
Rear Diff fill hole
Where is the fill hole for the rear diff? I have a 99 EB 4X4. I quickly looked but didn't see one. While I was under there last week changing the oil I noticed that there was a drain and fill plug on the front axle. Didn't notice one on the rear.
The rear diff plug is on the driver side of the diff, on the front upper end of the housing, near the drive shaft. It takes a square 3/8" drive socket extension in the plug to open it. Takes 2 minutes. There is no drain plug; you take the cover off instead.


