Diff Oil Change
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Member
Joined: Jan 2013
Posts: 180
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From: Fort Lauderdale, FL
2010 C300 4Matic, 2011 GL450, 2005 ML500, 2010 GL350 and 2003 SLK230
Diff Oil Change
My 2010 GL 350 with 115k Miles and was thinking of changing front / rear / center diff/ transfer case. Now I know some might say it can do more harm than good after a certain mileage. Just wanted to hear from people that changed at high mileage or has high mileage without changing with their experience.
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Joined: Sep 2005
Posts: 6,185
Likes: 241
From: Albuquerque
'10 CL550, '12 GL550
I changed all three at 75K miles and 11 years
The differential gear oil looked brand new.
The transfer case ATF looked a little less than new.
Note that both fill and drain plugs on the differentials are sealed with O-rings, not washers. Buy new plugs, they come with O-rings attached.
The two plugs on the transfer case will require new crush washers.
You're going to have to pump the new fluids in, as gravity feed can't happen.
The differential gear oil looked brand new.
The transfer case ATF looked a little less than new.
Note that both fill and drain plugs on the differentials are sealed with O-rings, not washers. Buy new plugs, they come with O-rings attached.
The two plugs on the transfer case will require new crush washers.
You're going to have to pump the new fluids in, as gravity feed can't happen.
Last edited by lkchris; Oct 31, 2018 at 03:40 PM.
