Rear Axle Droppings
Thread Starter
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Parts Nerd Extraordinaire
Joined: Sep 2010
Posts: 4,353
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From: Western NY
Rear Axle Droppings
If I leave my truck parked for a day or two, I will find 2-3 nickel to quarter sized splots of oil under the truck where the drive shaft meets the rear axle. Is this good/bad/normal? Do I just have to feed her a little lube? If so, what kind and how? I believe it's a dual speed rear end, but never operated it (does anyone know how?)
Hotshot
Joined: Oct 2009
Posts: 16,168
Likes: 4,767
From: Burbank, WA
Sounds like you've got a failing/failed pinion seal. And while it's not ideal, it's a pretty big job to replace simply for a tiny oil splot or two. It's probably a good idea to check your oil level, but it could drip like that for years without ever becoming "low". On my priority of list of things to do, that's a project that would be right at the bottom. My 2c.
Post Fiend
Joined: May 2008
Posts: 7,641
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From: Poway, Ca.
I had the same problem on my 9 3/8 and ended up tightneing up the cover plate bolts, then running a tube up from the breather, then finding it was getting oil that was dripping and flying back from a loose oil line up in front of the engine. I took care of all of those and come to find out I had a leaking brake line fitting that was dripping down it.
Pinion seal is a good possibility too. I'd clean and dry it off really good then go for a drive and see where it leaks from.
Pinion seal is a good possibility too. I'd clean and dry it off really good then go for a drive and see where it leaks from.
Thread Starter
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Parts Nerd Extraordinaire
Joined: Sep 2010
Posts: 4,353
Likes: 1,775
From: Western NY
How to check pinion oil level?
How does one do that? (The only experience I have with rear end maintenance is I watched my uncle replace his pinion gear on a much much newer non-ford truck)
Last edited by bmoran4; Sep 28, 2010 at 09:28 AM. Reason: Spelling
