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Technical Q&A. HOW TO's, TSB's & Warranty Items Have a Problem? Technical Questions & Answers. HOW TO's & TSB's, Warranty Issues

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Old 06-18-2005, 12:18 AM   #1
MachRan
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I have gear oil on my muffler

Where could this be coming from?
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Old 06-18-2005, 02:34 AM   #2
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Re: I have gear oil on my muffler

prolly the front pinion seal on the rear end
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Old 06-18-2005, 03:12 AM   #3
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Re: I have gear oil on my muffler

Could be:

Front pinion seal.
Loose drain plug on the axle.
Left or right axle seal leaking.
Leaking rear axle cover.
Worst case senerio... cracked axle housing or axle tube.
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Old 06-18-2005, 11:47 AM   #4
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Re: I have gear oil on my muffler

Looks like it may be the front pinion seal.
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Old 06-18-2005, 11:52 AM   #5
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Re: I have gear oil on my muffler

you sure it is gear oil and not tranny fluid?

you could be getting seapage from the rear seal of the tranny...
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Old 06-18-2005, 12:10 PM   #6
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Re: I have gear oil on my muffler

It is on the rear end housing and muffler only. And it smells like gear oil.
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Old 06-18-2005, 12:30 PM   #7
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Re: I have gear oil on my muffler

most likely the pinion seal then...
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Old 06-18-2005, 12:38 PM   #8
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Re: I have gear oil on my muffler

thanks, What should I do?
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Old 06-18-2005, 03:29 PM   #9
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Re: I have gear oil on my muffler

Since everyone else listed the likely sources, I just wanted to make sure you checked those pesky muffler bearings? May have blown a seal there also.
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Old 06-18-2005, 06:03 PM   #10
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Re: I have gear oil on my muffler

:LAUGH:
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Old 06-18-2005, 06:49 PM   #11
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Re: I have gear oil on my muffler

Quote:
Originally Posted by substanger
Since everyone else listed the likely sources, I just wanted to make sure you checked those pesky muffler bearings? May have blown a seal there also.
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Old 06-18-2005, 07:02 PM   #12
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Re: I have gear oil on my muffler

I had the same thing and it was my front pinion seal..i was getting new gears a couple days later so he changed it BUT after the gear and axel swap i was smelling it real real bad ..I thought to myself ,"self " cuz thats what i call myself maybe it was a little extra that got on somethings under there I looked under the car and the entire back under carrage lookd like a gear oil bomb went off i took it to the local jiffy screw and they said the oil was full ... so whats up wit dat shizzel my nizzel...
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Old 06-23-2005, 09:34 PM   #13
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Re: I have gear oil on my muffler

Anyone have an idea what could cause this?
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Old 06-23-2005, 09:48 PM   #14
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Re: I have gear oil on my muffler

It can be caused by a "bad" seal, road debris getting caught under the chassis, low lubricant/heat condition, excess "play" in the pinion bearing, etc.
Usually no big deal to replace.
Good time to add that FRPP aluminum driveshaft though............
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Old 06-24-2005, 12:25 AM   #15
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Re: I have gear oil on my muffler

on my 87 lx coupe, i have had gear oil work its way out through the threads of the pinion nut believe it or not. after a quick removal of the nut, spread some rtv on the threads, reinstall nut and torque to spec. good to go!
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Old 06-24-2005, 10:41 AM   #16
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Re: I have gear oil on my muffler

I think the guy who did my rear did a poopy job.
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Old 06-25-2005, 02:54 PM   #17
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Re: I have gear oil on my muffler

Are you sure the differential wasn't overfilled and the excess is comming out the top vent opening on the passenger side of the axel tube, then splashing onto the back of the muffler? Is the cap still on that axel tube vent?
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Old 06-25-2005, 10:35 PM   #18
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Re: I have gear oil on my muffler

Quote:
Originally Posted by BlackMach
Are you sure the differential wasn't overfilled and the excess is comming out the top vent opening on the passenger side of the axel tube, then splashing onto the back of the muffler? Is the cap still on that axel tube vent?
It`s funny you mention that. I noticed it was wet around that vent yesterday. I need to jack the car up high and crawl all the way under and find the source.
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