Differential fill plug
Thread Starter
Melting Slicks
Joined: Oct 2003
Posts: 2,189
Likes: 830
From: Chapel Hill NC
2025 c3 ('68-'73) of the Year Finalist - Unmodified
2025 C4 of the Year Finalist - Unmodified
2025 C8 Stingray of the Year Finalist - Unmodified
Differential fill plug
The spare tire carrier and the rear leaf spring are prohibiting easy access to a tight fitting fill plug on my '66 differential. Any suggestions? thanks
Melting Slicks
Joined: Nov 2002
Posts: 2,460
Likes: 5
From: Wheaton IL
There is an SAE socket that fits the square pattern of the plug very well. You can get up in there with a socket, a universal extension, and a ratchet. Believe it or not you can also get a standard bottle of gear lube up there to fill it without a hose!
brian
brian
Race Director
Joined: Apr 2005
Posts: 11,277
Likes: 2,139
From: Bowling Green, Kentucky
I purchased a complete set of 8 pt sockets from Sears (Craftsman) many years ago just for this plug, and to have for any future needs on the car. Found that my differential plug was off-size, and NONE of the new sockets fit. 
After a bit of trial and error, the best fit was obtained with one of my standard 12 pt sockets. No further problems.
Suggest you try various 12 pt sockets to see if you can get an acceptable (good) fit prior to buying the 8 pt. Take some care when using to avoid rounding-off the plug.
Larry
After a bit of trial and error, the best fit was obtained with one of my standard 12 pt sockets. No further problems.Suggest you try various 12 pt sockets to see if you can get an acceptable (good) fit prior to buying the 8 pt. Take some care when using to avoid rounding-off the plug.
Larry
