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Old 08-23-2011, 10:33 PM   #1
eurospek
Scooby Guru
 
Member#: 96944
Join Date: Sep 2005
Chapter/Region: MWSOC
Location: Hampshire, IL
Vehicle:
2005 SAAB 9-2X AERO
4eat Stage 2 Protuned

Default Burning off diff fluid, is this possible?

So while getting my front 02 sensor replaced at a shop today (OEM crapped out at 62K), I was informed I was low on diff fluid, about a quart too low.

I had my 60K service done at 52K when my 4eat was rebuilt and the diffs were filled with Motul stuff, whatever they had at the shop. I ran Amsoil stuff until then, but they didn't see the Amsoil gear fluid among the Amsoil ATF and oil that I brought with me for the 60K service.

Is it possible to lose so much within 10K miles? Does diff fluid burn off the same way as motor oil? In all honesty, I never bother to check it between maintenace intervals, only check oil levels religiously.

It might have been low from the get go at 52K as I was informed that my ATF was overfilled, so it might be shop carelessness to begin with.
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Old 08-23-2011, 10:39 PM   #2
CosmoTheCat
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Member#: 3409
Join Date: Jan 2001
Chapter/Region: NWIC
Location: Woolley
Vehicle:
1998 Ram 2500
Green.

Default

It will leak, but there's nowhere for it to burn off. Motor oil can seep into the combustion chamber. If your gear oil is getting into the combustion chamber, you've got some serious issues.

But seriously, a 4eat front diff only holds 1.2-1.4 quarts of lube, I would think you've got problems if it's empty.
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Old 08-23-2011, 10:45 PM   #3
eurospek
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Member#: 96944
Join Date: Sep 2005
Chapter/Region: MWSOC
Location: Hampshire, IL
Vehicle:
2005 SAAB 9-2X AERO
4eat Stage 2 Protuned

Default

What's the rear diff fluid capacity?

Edit:

Found them! For the 4eat:

Rear Diff = 1.7 pints or .85 qts
Front Diff = 2.7 pints or 1.35 qts

Last edited by eurospek; 08-23-2011 at 11:07 PM.
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