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Old 04-12-2013, 03:55 PM   #1
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Leaking!!! Help!!!

I have a 2008 rubicon unlimited with 138,000 miles. It has now developed a leak of what appears to be oil and antifreeze coming from the area between the motor and tranny. Oil in the motor itself is still clean and the antifreeze is clean in the radiator and overflow. Any ideas would be appreciated. Thanks.

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Old 04-12-2013, 04:21 PM   #2
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Are you losing oil? Your rear main seal could be leaking. That would possibly explain your oil leak. Could it be tranny fluid by any chance?

Auto or manual?

Are you low on oil and coolant and that's how you know or just a guess?

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Old 04-12-2013, 04:42 PM   #3
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Are you losing oil? Your rear main seal could be leaking. That would possibly explain your oil leak. Could it be tranny fluid by any chance?

Auto or manual?

Are you low on oil and coolant and that's how you know or just a guess?
It is a manual. Pretty sure it's antifreeze because when the two mix on my garage floor it looks like chocolate milk. I'm due for an oil change, and I always use a little, so that's normal, but the antifreeze is not. I was afraid it was the rear main. Excuse my ignorance, but would antifreeze leak from the rear main as well?
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Old 04-12-2013, 06:36 PM   #4
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i bet 100$ is a rear main seal which means you gotta take out the tranny to replace a 5$ gasket. my jeep has been at the dealership for 2 weeks on this same issue. the total bill is gonna be 1400$ good thing i bought an extended warranty when i bought the jeep
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Old 04-12-2013, 08:08 PM   #5
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No, the rear main seal is a rubber gasket behind the rear most crankshaft bearing. It keeps oil from coming out of the crank case. The oil leak part is consistent with a rear main seal leak but I'm not really sure about the coolant.

A temporary fix would be running 50 weight oil or using additives to soften the rubber gasket and maybe that will work. Unfortunately it'll take a lot of work to get at the rear main seal so hopefully its not
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Old 04-13-2013, 11:39 AM   #6
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No, the rear main seal is a rubber gasket behind the rear most crankshaft bearing. It keeps oil from coming out of the crank case. The oil leak part is consistent with a rear main seal leak but I'm not really sure about the coolant.

A temporary fix would be running 50 weight oil or using additives to soften the rubber gasket and maybe that will work. Unfortunately it'll take a lot of work to get at the rear main seal so hopefully its not

Yea. And to confirm that the rear main seal is leaking you have to remove the transmission. Right?
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Old 04-13-2013, 11:48 AM   #7
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Is the oil leaking from the vent holes on the bottom of the clutch housing?
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Old 04-13-2013, 12:08 PM   #8
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I think the first thing you should do is wash down the whole engine and transmission area and then check for leaks, the oil could be coming from the top of the engine like a valve cover, coolant from a freeze plug , head or heater hose
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Old 04-14-2013, 08:58 AM   #9
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The leak is from the vent holes. Strangely, the antifreeze has slowed and almost stopped and there is still plenty in the reservoir. It goes to the shop this week, hopefully won't be too bad.....yeah right. I washed everything down a week or so ago because I suspected a leaking drain plug. Not that lucky.
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Old 04-15-2013, 11:47 AM   #10
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Is the oil leaking from the vent holes on the bottom of the clutch housing?
Just curious. If so, what would that indicate?
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Old 04-15-2013, 11:59 AM   #11
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Just curious. If so, what would that indicate?
The flywheel is attached to the rear of the crankshaft, which is where the rear main seal is located. The bell housing of the transmission covers this on the jk so if its leaking out the rear main seal it would run down the bell housing and out the clutch vent
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Old 04-15-2013, 01:40 PM   #12
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Old 04-16-2013, 04:00 AM   #13
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^ That's a TJ! The JK engine changes may affect that information.

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