Rear End Leakage
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Postmaster
Joined: Aug 2004
Posts: 4,004
Likes: 1
From: North of Boston MA
Rear End Leakage
I noticed what appeared to be some seepage when I had the bed off. You can see the spot in the photo above. I wirewheeled the area and put some POR type crap on it. Lately I have been noticing a very small stain on the driveway under the truck.
Am I in for a new cover? How hard is the job? Any tips and tricks? Anything else worth doing while I have it apart?
Thanks
Posting Guru
Joined: Jul 2009
Posts: 1,069
Likes: 1
From: Toledo, Ohio
Is the gasket any good on there? Wire wheel up the cover if you cant tell if its bad or not. I dont know how much you know but, if you undo the bolts around the cover you will peel off the gasket and the diff. fluid will drain. Scrape the gasket mating surfaces and install a new gasket. Its not hard to do.
Is this what youre looking for?
Is this what youre looking for?
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Postmaster
Joined: Aug 2004
Posts: 4,004
Likes: 1
From: North of Boston MA
It's been many years since I have torn a vehicle rear end apart but I think I remember the basics.
I am thinking it isn't the gasket that is leaking but the actual cover. I don't see any signs around the mating surfaces where it is leaking. If it is anything like the rest of the truck, the cover is probably paper thin. Based on the extent of the rust on the frame, the tanks and the brake lines aft of the cab, I am guessing this truck was once used to put boats in salt water.
Anyway, if the cover is leaking should I try to patch it or would the cover be readily available for a reasonable price?
Also, where is the fill hole on these?
I am thinking it isn't the gasket that is leaking but the actual cover. I don't see any signs around the mating surfaces where it is leaking. If it is anything like the rest of the truck, the cover is probably paper thin. Based on the extent of the rust on the frame, the tanks and the brake lines aft of the cab, I am guessing this truck was once used to put boats in salt water.
Anyway, if the cover is leaking should I try to patch it or would the cover be readily available for a reasonable price?
Also, where is the fill hole on these?
Senior User
Joined: Nov 2008
Posts: 139
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From: okc,oklahoma
the standard gasket should be blue rtv. to get the cover off you just take the bottom bolts all the way out and loosen up the other and pry the cover at the bottom to drain into a pan. this way you have very little mess to clean up. the just take the bolts out and your done. i would try a salvage yard for another cover if you think that's the problem.
Posting Guru
Joined: Jul 2009
Posts: 1,069
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From: Toledo, Ohio
Id look up a price for a new cover. In my personal opinion, I dont patch things. Then again, im not and dont have a welder available. Check at the local parts stores.. If you can order fuel tanks and engines through places I dont see why a cover wouldnt be available. As for the fill plug.. Id assume its on the front side of the differential. I cant remember if its Ford or Chevy, but one of them you have to drain it by unbolting the cover... So, by that I mean there is a plug of some sort, whether its a fill or drain im not sure off hand.
Posting Guru
Joined: Sep 2008
Posts: 1,123
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From: Baltimore
3/8ths ratchet/extension will take it out. It's a plug with the square in it. Faces driver's rear tire.
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Fleet Mechanic
Joined: Mar 2005
Posts: 1,603
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From: St Louis
If the cover is leaking and you have sever rust problems on the truck, I would just get a new/new-to-you cover. I looked a similar cover up on broncograveyard for 50 bucks list price for an OEM cover. You could probably get a scrap yard piece, or even a new one from ford since the 10.5 still uses the same cover to replace your current one.
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Postmaster
Joined: Aug 2004
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From: North of Boston MA
So I finally found some time to try to tackle the leaking rear end cover. Bought the new part yesterday at a local dealership - paid too much but it was in stock.
Anyway, today I took the bolts out and had to destroy several of the to get them out. Had to resort to hammer and chisel method since nothing else would work. Does anyone know off the top of their head what the correct bolt would be for this?
Also, any tips on getting the fill plug out? It doesn't want to budge even after several applications of my favorite penetrating oil.
The inside of the diff looked okay to me. Only thing I noticed was a really bad burnt smell. Is this the normal smell of used 80/90 gear oil?
And finally, do I need to add any friction modifier to the oil?
Thanks for any advice.
Anyway, today I took the bolts out and had to destroy several of the to get them out. Had to resort to hammer and chisel method since nothing else would work. Does anyone know off the top of their head what the correct bolt would be for this?
Also, any tips on getting the fill plug out? It doesn't want to budge even after several applications of my favorite penetrating oil.
The inside of the diff looked okay to me. Only thing I noticed was a really bad burnt smell. Is this the normal smell of used 80/90 gear oil?
And finally, do I need to add any friction modifier to the oil?
Thanks for any advice.
Logistics Pro
Joined: Sep 2009
Posts: 4,821
Likes: 53
From: Fulton County, Pa.
So I finally found some time to try to tackle the leaking rear end cover. Bought the new part yesterday at a local dealership - paid too much but it was in stock.
Anyway, today I took the bolts out and had to destroy several of the to get them out. Had to resort to hammer and chisel method since nothing else would work. Does anyone know off the top of their head what the correct bolt would be for this?
Also, any tips on getting the fill plug out? It doesn't want to budge even after several applications of my favorite penetrating oil.
The inside of the diff looked okay to me. Only thing I noticed was a really bad burnt smell. Is this the normal smell of used 80/90 gear oil?
And finally, do I need to add any friction modifier to the oil?
Thanks for any advice.
Anyway, today I took the bolts out and had to destroy several of the to get them out. Had to resort to hammer and chisel method since nothing else would work. Does anyone know off the top of their head what the correct bolt would be for this?
Also, any tips on getting the fill plug out? It doesn't want to budge even after several applications of my favorite penetrating oil.
The inside of the diff looked okay to me. Only thing I noticed was a really bad burnt smell. Is this the normal smell of used 80/90 gear oil?
And finally, do I need to add any friction modifier to the oil?
Thanks for any advice.
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
Use a torch and heat up the area around the plug to get it out, might have to get it quite hot to get it to turn the first time. Go easy as not to round out the square socket built into the plug, got a heck of a mess if you do that. Watch the extension or ratchet too, the little spring and ball that holds sockets on, the hole its in, weakens the very end of em, might need a short piece of square stock if its a real tough one.
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Postmaster
Joined: Aug 2004
Posts: 4,004
Likes: 1
From: North of Boston MA
I'm not putting the cover on until I get the drain plug out. I guess I am kind of screwed if I can't get it out though....
I am hoping to tackle the rest of this tomorrow - anybody have any ideas on the bolts?
Thanks again.
I am hoping to tackle the rest of this tomorrow - anybody have any ideas on the bolts?
Thanks again.