Oil on the underside - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 13 (permalink) Old 04-08-2009, 10:57 PM Thread Starter
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Oil on the underside

I was changing the oil today and just kinda browsed under the truck and where u-joint rear drive shaft and the converter meet there was oil. The oil looked like it might have leaked out of the transfer case but I am not quite sure. There is oil on my exhaust pipe as well. I will try to get a pic up here in a min.

Any ideas
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post #2 of 13 (permalink) Old 04-08-2009, 11:12 PM Thread Starter
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post #3 of 13 (permalink) Old 04-09-2009, 12:10 AM
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Where is your breather tube? I usta have oil everywhere b/c it hung down so much, I cable tied it up and the oil dissapeared...but idk just a thought...

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post #4 of 13 (permalink) Old 04-09-2009, 02:12 AM
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Looking at the way it has a trail of oil from the truck body to exhaust pipe and yoke looks like it has been driping and running down, I would say seal went south.

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post #5 of 13 (permalink) Old 04-09-2009, 03:04 AM Thread Starter
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That's what I was thinking ^ but I really hope its not. Either way I need to check my transfer fluid, its probably low if that's the case. As far as the breath line goes I built a thing like moparman did, not exactly but it looks similar and I am pretty sure its not that. It looks like it has been slung off of the yoke.
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post #6 of 13 (permalink) Old 04-09-2009, 11:55 AM
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Originally Posted by JLWelding View Post
Looking at the way it has a trail of oil from the truck body to exhaust pipe and yoke looks like it has been driping and running down, I would say seal went south.
Yes, either the seal or the slip yoke itself. Some of them had a plug pressed in the end of the splines just forward of the u-joint. Oil could be traveling down the splines and seeping through the end plug. Definitely spraying off the driveshaft judging by the pattern on the exhaust pipe.

After looking at the rest of your pics I am now leaning towards the seal, but I think your yoke does have the plug, I think I see it in the last pic.

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Last edited by Deeslfxr; 04-09-2009 at 12:01 PM. Reason: Looked at rest of pics AFTER I opened my mouth...
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post #7 of 13 (permalink) Old 04-09-2009, 11:36 PM Thread Starter
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You think its anything I need to worry about right now?
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post #8 of 13 (permalink) Old 04-10-2009, 03:59 PM
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Any oil leakage is something to worry about...

Like in the past I had a small eak in the front seal of my Mom's Auto trans on her 1996 Dodge. I thought the same thing... Just a little weepage... Well... After that day the bearing gave up in the trans pump and ate the seal and left me sitting in the driveway with a huge puddle of ATF pouring out... :

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post #9 of 13 (permalink) Old 04-10-2009, 10:58 PM
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Will overfilling these cause the seal to go south?

"some people do, some people talk."
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post #10 of 13 (permalink) Old 04-11-2009, 04:34 PM Thread Starter
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I heard it can, something about how it causes too much pressure. Im sure mopar will chime in here in a few.
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