Differential Plug Gasket or Replace Plugs?

ericedelman · 03-30-2020, 07:24 PM

Is there a replacement gasket for the differential fill plugs, or are the plugs single use only?
I used two GM 55573646 plugs as replacements when I changed the gear oil this past weekend. The plugs are around $4 a piece from the dealer, which I suppose isn’t that bad considering I pumped in $50 worth of GM gear oil.

driven2exceSS · 03-30-2020, 07:54 PM

My very first diff change I reused the OEM plugs "as is", then the following changes I've replaced the crushed OEM gaskets only, with something like these without issues...

(10 gaskets for about $10 bucks)
https://www.dormanproducts.com/p-695-097-139.aspx

Stephen12ZL1 · 04-02-2020, 04:04 PM

Quote:

Originally Posted by Kasey00

However, in some very rare cases, excessive pressure inside the rear end housing can also lead to pushing the gasket out which can also create a leak. Under most circumstances, a slow leaking differential won't cause any problems with driving. However, since the oil supply has no way of being replenished without physically adding it to the differential.

excessive pressure in the rear? You realize there is a vent on top of the differential to prevent this "situation".

03-30-2020, 07:24 PM	#1
ericedelman Drives: 2020 ZL1 Join Date: May 2010 Location: Syracuse, NY Posts: 95	Differential Plug Gasket or Replace Plugs? Is there a replacement gasket for the differential fill plugs, or are the plugs single use only? I used two GM 55573646 plugs as replacements when I changed the gear oil this past weekend. The plugs are around $4 a piece from the dealer, which I suppose isn’t that bad considering I pumped in $50 worth of GM gear oil. __________________ *2020 ZL1*

03-30-2020, 07:54 PM	#2
driven2exceSS Drives: 2016 2SS BLK A8 Vert Join Date: Dec 2017 Location: MA Posts: 1,040	My very first diff change I reused the OEM plugs "as is", then the following changes I've replaced the crushed OEM gaskets only, with something like these without issues... (10 gaskets for about $10 bucks) https://www.dormanproducts.com/p-695-097-139.aspx __________________ NPP, MRC, Tinted side & rear reflectors, OEM ZL1 Rockers / 3rd Brake / Darken tail lights, OEM Blk rear splash guards, Satin hood wrap, Fuse pull, Sound tube delete, Cat delete, Ported 95 TB, Ported MSD IM, Dry RotoFab, ARH 1 7/8 headers, E85, "Performance Dyno" Tune, BMR "pieces", "Track" alignment, Hawk DCT-70/70's w/SRF, Goodridge lines, Ti shims, Red powdered calipers, 18" APEX SM-10's w/ Pirelli DH's, FE4 Vert swaybars, Brake cooling ducts, ATI 10% UD, Vorshlag camber plates, OEM 1LE Splitter w/APR Ext., Velossa BIG MOUTH Ram Air, CF QA1, ZLE brakes(F)

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