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#1
10-22-2012, 04:14 PM
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560 SEL rear end rebuild
Been putting this one off. I searched but did not really get the info on what is needed.
I plan to open and replace the gear oil in the diff. While in there I will rotate the shafts to opposite sides if they are not too worn yet. What I really need is more or less a shopping list. But I do not have all part numbers. If anyone has those, it would be a big help when ordering. I ordered two shaft boots. Just going to assume they are going to fail soon. Two side cover seals for the casing (think they are o-rings). What I need is to know if there is a gasket for the cover or if its just RV sealed type stuff. A part number for the diff mont would be nice too. Other than above, what else should I do as long as I am in there. Any help is appreciated.
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1991 560 SEL / 185k miles 1992 750il / 17k miles - project car 
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#2
10-23-2012, 08:23 AM
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Sounds more like a re-seal, do you have leaks?
There is a o-ring under each of the side covers & seal rings where the axles go into the diff. The rear cover uses RTV as a sealant. Make sure to use the MB factory limited slip oil.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#3
10-23-2012, 09:49 PM
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No leak. But I have never changed the fluid and figure if I am in there, I may as well do what I can. Including swapping the shafts around and diff mount. Its all easy stuff after all, just want to make sure I have everything I need!
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1991 560 SEL / 185k miles 1992 750il / 17k miles - project car
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#4
10-23-2012, 10:31 PM
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Why spend all this time/money if you have no leaks? Just service the diff and get on with life.
Diff mount I understand, but I have never seen nor heard of a reason to swap the axles. Rebooting axles without a tool is very difficult.
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I'm not a doctor, but I'll have a look.  '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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#5
10-24-2012, 08:00 AM
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You mean the axle half shafts? I can't think of a good reason to do that, but the biggest part will be loosening and retorquing the axle nut.
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Prost! 
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#6
10-24-2012, 09:05 PM
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You guys never heard of rotating the shafts around? Something I have done before on other cars. The shafts wear on one side. Swapping them makes them feel new. I have a slight thunk in the back, which is why the shafts are coming out anyway. To inspect them.
I guess I will figure things out. There are not much parts. Just sorta hate it when people tell me what to do. I am refreshing things because I want to. Tell me just to swap fluid does not help...
__________________
1991 560 SEL / 185k miles 1992 750il / 17k miles - project car
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#7
10-25-2012, 07:45 PM
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Thunk in the rear is more likely diff or subframe mounts I think.
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2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k
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