rear diff fluid looks new
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Joined: Jun 2008
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2010 C63
rear diff fluid looks new
I just drained my rear diff expecting some nasty foul smelling stuff to come out. instead, I get what looks like brand new clean oil. I have 130,000 miles and I've never changed this fluid before. WTH?
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Joined: Jun 2009
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From: Atlanta Metro
Current: C217 V12TT AMG Previously: C55 AMG, SL65 AMG
The previous owner might have replaced an axle seal due to leak. They're slightly common on our cars. Check to see if any of your seals look newer, and/or if your axle nut (near the wheel) looks new or removed and renotched.
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2021 Yukon XL Denali, 2017 GLS450 4MATIC, 1993 Chevy Corvette
Did you have any trouble removing either the drain or filler plugs? What fluid did you use for the change?
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From: Livingston, California.
2002 c32 AMG 2012 c250 Coupe
My car just reached the 50k mark a couple days ago but also would like to do this oil change since it just turned 9 and a half years old..
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2010 C63
I don't think anything bad will happen if you never change this stuff. There is no dirt or combustion going on in the area, and the diff has a decent heat sink on it. I only changed mine because I'm going to the track this weekend.
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From: Phoenix AZ & Cayucos CA
’27 AMG SL55(ordered), ‘23 EQS 580 SUV, ‘19 AMG E53 Cpe, ‘48 Willys Jeepster
I do mine every 40-50k as a preventative measure. I like the idea of getting accumulated metal filings and moisture out as well as renewing the additives. That, and it's cheaper than buying a new parts.
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From: New mexico
2005 E55 AMG
+1...A new diff or gears would be more than the car is worth outing into if you had to buy it new. It's cheap and only takes a few minutes. When I changed mine it looked like glitter with all of the metal shavings present plus the oil breaks down with time. If any moisture ever gets in there you want it out asap otherwise it could be catastrophic for the gears.
