The Ford Barn

Daves55Sedan · 09-05-2018, 08:06 PM

The shop manual says that the banjo housing requires 3-1/2 pints (that is a little less than a quart) of 90 wt gear oil. I don't see how that little amount will come anywhere near touching the rubber of the rear axle shaft seals.
I saw another source that said 1 quart. Still ???
Then I saw another source that said fill it up till it spills out of the filler plug hole in the differential housing. Well, that will certainly submerge all the oil seals.
Theoretically, I would have thought that enough to go up to the center of the axle shafts would be more than plenty, since the turning of the shafts would sling the oil around and keep the seals wet.

I ask this question because I am in the process of replacing my axle shaft seals, but when I pulled out the axle shafts, there was no oil pouring out of the end of the axle housing (which means that oil was not even touching the rubber part of the seals).
What say you all?

09-05-2018, 08:06 PM	#1
Daves55Sedan Senior Member Join Date: May 2010 Location: Granite City, Illinois Posts: 3,008	'55 car rear end oil capacity The shop manual says that the banjo housing requires 3-1/2 pints (that is a little less than a quart) of 90 wt gear oil. I don't see how that little amount will come anywhere near touching the rubber of the rear axle shaft seals. I saw another source that said 1 quart. Still ??? Then I saw another source that said fill it up till it spills out of the filler plug hole in the differential housing. Well, that will certainly submerge all the oil seals. Theoretically, I would have thought that enough to go up to the center of the axle shafts would be more than plenty, since the turning of the shafts would sling the oil around and keep the seals wet. I ask this question because I am in the process of replacing my axle shaft seals, but when I pulled out the axle shafts, there was no oil pouring out of the end of the axle housing (which means that oil was not even touching the rubber part of the seals). What say you all?