Leaking Differential

brianhn1 · 04-16-2009, 03:28 PM

I put the car on my lift and was checking to see the part number on my differential and saw that it had been leaking pretty recently. Anyone here had this issue before? How common is this?

vgame64 · 04-16-2009, 03:33 PM

Damn...take that to the dealer so they can swap your diff out. I was looking at mine yesterday to find the fill plug and it is dry as a bone.

roadkillrob · 04-16-2009, 03:39 PM

It looks like it is coming from the top, there should be a vent in the top, maybe the vent has failed or it was overfilled at the factory - time for the dealer either way!

brianhn1 · 04-16-2009, 03:47 PM

Boo. I don't want to waste my time at the dealer for just an overfilled diff. Does anyone know the diff fill level? I might just open it myself and check it now.

vase330 · 04-16-2009, 03:47 PM

I am not sure there is a vent. Our cars have sealed diffs and transmissions thats why you can go on forever without ever needing to refill them. That is most definitely a failed gasket or a housing failure resulting in some fracture of some sort (so called porous housing). Yeah you need to take it in its all covered by warranty.

zsapphire7 · 04-17-2009, 12:17 AM

There is a vent otherwise it could potentially explode under pressure

.

brianhn1 · 04-17-2009, 02:35 PM

Quote:

Originally Posted by roadkillrob

It looks like it is coming from the top, there should be a vent in the top, maybe the vent has failed or it was overfilled at the factory - time for the dealer either way!

We have a winner.

CA claims to have said that the factory had overfilled the differential casing with too much oil. The excess oil started spouting out the relief hole on the top of it. Guess I had given a nice heating with the abuse I give it and it expanded/boiled out? haha who knows.

At least it is good to know that I didn't cause premature wear on the gears by running low on oil.

canrhea · 04-17-2009, 04:12 PM

someone is looking to get a LSD lol, good to see your car is fine.

04-16-2009, 03:28 PM	#1
brianhn1 Slow Mo 15 Rep 534 Posts Drives: BMW Join Date: Jun 2008 Location: US iTrader: (0)	Leaking Differential - Anyone had this before? I put the car on my lift and was checking to see the part number on my differential and saw that it had been leaking pretty recently. Anyone here had this issue before? How common is this? __________________ BMW '17 X5 35i, '15 M4, ED 7/1/14, US 8/4/14, PU 8/18/14, '13 X5 35i, '08 335i Motorcycles: BMW '12 R1200GS, '10 F800GS, '74 R90S Last edited by brianhn1; 04-16-2009 at 11:57 PM..
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04-16-2009, 03:33 PM	#2
vgame64 Colonel 143 Rep 2,479 Posts Drives: BMW 335i Join Date: Jul 2008 Location: USA iTrader: (9)	Damn...take that to the dealer so they can swap your diff out. I was looking at mine yesterday to find the fill plug and it is dry as a bone.
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04-16-2009, 03:39 PM	#3
roadkillrob Major General 884 Rep 5,469 Posts Drives: 08 335i,22 X3M, 2012 C63 Black Join Date: Jul 2007 Location: NH iTrader: (15)	It looks like it is coming from the top, there should be a vent in the top, maybe the vent has failed or it was overfilled at the factory - time for the dealer either way! __________________ 2025 X5 Msport 2008 E93 335i FBO 2012 Mercedes C63 Black Series Alanite Grey
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04-16-2009, 03:47 PM	#4
brianhn1 Slow Mo 15 Rep 534 Posts Drives: BMW Join Date: Jun 2008 Location: US iTrader: (0)	Boo. I don't want to waste my time at the dealer for just an overfilled diff. Does anyone know the diff fill level? I might just open it myself and check it now. __________________ BMW '17 X5 35i, '15 M4, ED 7/1/14, US 8/4/14, PU 8/18/14, '13 X5 35i, '08 335i Motorcycles: BMW '12 R1200GS, '10 F800GS, '74 R90S
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04-16-2009, 03:47 PM	#5
vase330 Colonel 103 Rep 2,760 Posts Drives: 19 E63S; 15.5 RangeRover ATB Join Date: Jan 2007 Location: Arlington, Va iTrader: (1)	I am not sure there is a vent. Our cars have sealed diffs and transmissions thats why you can go on forever without ever needing to refill them. That is most definitely a failed gasket or a housing failure resulting in some fracture of some sort (so called porous housing). Yeah you need to take it in its all covered by warranty. __________________ E92 335 \| Space Gray \| Saddle Brown Dakota \| Dark Burl Trim \| ZPP \| ZSP \| AT \| Idrive \| 6FL \| FBO \| Dinan CAI \| Quaife LSD \| STG3 PROCede.
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04-17-2009, 12:17 AM	#6
zsapphire7 Colonel 104 Rep 2,368 Posts Drives: 08 e92 M3 Join Date: Oct 2007 Location: SF Bay Area iTrader: (21)	There is a vent otherwise it could potentially explode under pressure .
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04-17-2009, 04:12 PM	#8
canrhea Lieutenant 29 Rep 556 Posts Drives: 335i Join Date: Jan 2009 Location: GA iTrader: (0)	someone is looking to get a LSD lol, good to see your car is fine.
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