Author Topic: Pinion Seal Housing  (Read 388 times)

rasch

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Pinion Seal Housing
« on: July 21, 2025, 18:32:39 »
Hello,
I have removed my rear differential to update seals, wheel bearings, bushings... but I never opened the differential which itself seems to be in solid condition.  It was leaking from the front, and I intend to replace the pinion seal. 

My question is, does the pinion seal housing ever leak?  Is removal and reinstallation straight forward or do I need to worry about anything that is not obvious?  Since the axle is out, I want to take care of anything that could be a problem now, but I also don't want to fix something that isn't broken and create an unintentional problem.  From my experience differential covers don't leak that often but I also have read of a recommendation to remove the front housing cover.



Thanks!
« Last Edit: July 23, 2025, 05:56:00 by rasch »
Robert
1967 230sl

rwmastel

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Re: Pinion Seal Housing
« Reply #1 on: July 21, 2025, 20:04:36 »
https://www.sl113.org/wiki/DriveShaft/Differential

When you get your details and get the work done, perhaps you could add an entry here to help members with future repairs.

Is the silver color just a personal preference or did a restoration shop do that?
Rodd

Did you search the forum before asking?
2017 C43 AMG
2006 Wrangler Rubicon
1966 230SL auto "Italian"

rasch

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Re: Pinion Seal Housing
« Reply #2 on: July 21, 2025, 20:18:10 »
I see what you mean... however, the color is actually black. I think it just looks silverish in the photo due to reflected light or maybe it being overcast.  I painted it myself using black epoxy primer/sealer and Eastwood chassis black as a topcoat.   
Robert
1967 230sl

ja17

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Re: Pinion Seal Housing
« Reply #3 on: August 06, 2025, 05:03:37 »
The two machined surfaces are not normally a source for leaks. I believe that no gasket is used, just sealer.
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

 

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