Pagoda SL Group

W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: rasch on July 21, 2025, 18:32:39

Title: Pinion Seal Housing
Post by: rasch 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.

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Thanks!

Title: Re: Pinion Seal Housing
Post by: rwmastel 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?

Title: Re: Pinion Seal Housing
Post by: rasch 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.   

Title: Re: Pinion Seal Housing
Post by: ja17 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.