Rear End Question
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New User
Joined: May 2003
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Rear End Question
I have a 2000 F250 PSD 4x4 and this last weekend we were towing our trailer and noticed that the trailer had oil on the front of it. I looked under the truck and saw that there was gear oil all over. I crawled under the truck and it looked like the gear oil was coming out of the vent tube on the top of the rear end. I don't know if it just got hot or if there is a seal out. I have 60,000 miles on the truck and I have never changed the fluid. It isn't a dually so I was told it has 3:73 in it and it takes Synthetic?
Has anyone else ever had this problem?
Has anyone else ever had this problem?
Logistics Pro
Joined: Jul 2001
Posts: 4,137
Likes: 41
From: Marble Falls, Texas
I've had that problem occur from over filling the diff. But since you haven't messed with it this is my 2 cents. Maybe the diff has always been a little over full, but you never pulled hard enough with it to get the gears really hot. I figure the heat is what pushed it out the vent. In any case wheather it got hot, or the is suddenly too much fluid in it, you need to open it up and take a look. I would wash it all off and moniter it for a while and make sure it's not coming out of the pinion seal, or diff cover. I have broken gears before and not known it. In turn those broken gear pieces have punched little holes in the diff cover and it just spews out. Anyway hope that helps.
RubberDuck
RubberDuck
Junior User
Joined: Jan 2004
Posts: 79
Likes: 1
From: Northern CA
A bad axle seal can draw moisture in during the wet season, and eventually will mix and contaminate the oil causing cavitation and expansion. You might check all the seals for leakage and pull the fill plug to check for overfull or contamination. Water in dino oil makes choc. milk, I don't know how it will appear with synthetic.
Freshman User
Joined: Mar 2003
Posts: 28
Likes: 0
I just had a pinion seal begin leaking after a long trip (about 1500 miles) towing my 10,000 lb travel trailer. The truck has 110k miles on it, and I bought it used at 99k miles. I changed the pinion seal and it took about 2 hours. Not a big deal, seal cost about $8. A week later and no leaks. The leaking pinion seal coated the underside of the bed, axle, shocks and anything else nearby with a coat of synthetic gear oil due to the spinning of the driveshaft. I hope this helps.
gmelton
gmelton
