Rear axle
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Joined: Dec 2015
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Rear axle
Anyone have a 7700 series? I have an 02 and need to replace the rear axle housing gasket. How many ozs of fluid does it hold amd what weight? Any brands to stay away from or preferred? Thanks in advance
Rear axle
As in the gasket for the diff cover? You have a 10.25" so try to give it a google and see what pops. Those are a rare breed indeed.
Use 75-140 out back and anything will do as long as you get the ford friction modifier from your local dealer.
Use 75-140 out back and anything will do as long as you get the ford friction modifier from your local dealer.
Last edited by jprevat; Dec 5, 2015 at 03:04 AM.
Joined: May 2013
Posts: 3,252
Likes: 385
From: Katy, Republic of Texas
The 10.25 requires 3.1 L of 75w-140 synthetic gear oil, and if you have limited slip, 8 oz of friction modifer.
This is all per the owners manual which is easily found online.
This is all per the owners manual which is easily found online.
5 Year Member
Joined: May 2014
Posts: 4,574
Likes: 970
From: Chico, Ca.
Three quarts plus the friction fluid will fill it. I don't use gaskets anymore on diff. covers. Clean it thoroughly (both surfaces) and use Permatex Ultra Black RTV silicone sealant. It will not leak. Put down a bead about 1/8" dia. right down the center of the cover flange and encircle the bolt holes. When you put it back on, the trick is to put two opposing bolts through the cover and get it straight into place without smearing it around. Come to think of it, a couple pencils might make good alignment pins.
P.S. You're gonna pucker when you see what that 75-140 synthetic costs. Any recognized name brand is fine.
P.S. You're gonna pucker when you see what that 75-140 synthetic costs. Any recognized name brand is fine.
Last edited by PerryB; Dec 5, 2015 at 08:31 AM.
