I have gear oil on my muffler
 

Where could this be coming from?

Re: I have gear oil on my muffler
 

prolly the front pinion seal on the rear end

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.

Re: I have gear oil on my muffler
 

Looks like it may be the front pinion seal.

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...

Re: I have gear oil on my muffler
 

It is on the rear end housing and muffler only. And it smells like gear oil.

Re: I have gear oil on my muffler
 

most likely the pinion seal then...

Re: I have gear oil on my muffler
 

thanks, What should I do?

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. :23:

Re: I have gear oil on my muffler
 

:LAUGH:

Re: I have gear oil on my muffler
 

:23: :31:

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...

Re: I have gear oil on my muffler
 

Anyone have an idea what could cause this?

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............

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!

Re: I have gear oil on my muffler
 

I think the guy who did my rear did a poopy job.

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?

Re: I have gear oil on my muffler
 

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.