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Differential Fill Level

Old Apr 27, 2016 | 04:23 PM
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Default Differential Fill Level

'79

Just changed the differential lube and I was surprised that at least 5-6 ounces came out when removing the plug. Were these overfilled from the factory?
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Old Apr 27, 2016 | 04:29 PM
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are you the original owner and have never changed the fluid before? I would doubt GM would intentionally overfill anything on the production line.
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Old Apr 27, 2016 | 04:37 PM
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No, I'm not the original owner and the previous owner died unexpectedly so I have no idea what was done to it in the past. About 54k (verified) on the clock. No sign of leakage and while nearly black the lube seemed nicely viscous. Replaced with the car on four jack stands so it was nearly level.
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Old Apr 27, 2016 | 04:51 PM
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edit: nm op answered already bout level

Last edited by BOOT77; Apr 27, 2016 at 04:52 PM.
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Old Apr 27, 2016 | 04:52 PM
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Originally Posted by BOOT77
Was your car level or just the rear jacked up?
On four jack stands so very close to level.
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Old Apr 27, 2016 | 06:00 PM
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Originally Posted by SwampeastMike
On four jack stands so very close to level.

The previous owner probably filled it with the rear end only jacked up so it got a bit overfilled (which wouldn't hurt anything).
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Old Apr 27, 2016 | 06:21 PM
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Originally Posted by Mountainoakie
The previous owner probably filled it with the rear end only jacked up so it got a bit overfilled (which wouldn't hurt anything).
That was my other thought after intentional overfilling at the factory.
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Old Apr 27, 2016 | 08:12 PM
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Originally Posted by SwampeastMike
On four jack stands so very close to level.
LOL lightening quick on that reply I posted, saw two posts were made and then edited my post.
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