Ok, now that I know how to remove the plug on my 7 1/4, I can see is missing oil. Which oil should I use?. It is a non-locking one (I lifted it and move one wheel, the other remained in position. When I engaged a speed (engine shut), and moved one by hand the other rotated in opposite direction). I fear using GL-5, as I don't know if there are brass parts that can get damaged... but it looks that the standard auto stores only have that one. Any recommendation? (I guess MIL-L-2105B oil standard and Chrysler P/N 2585317 (as the Service Manual reccomend) are too old for anybody to remember...)

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/6 Dodge Charger 69
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There's no brass parts in a open diff, so GL-5 is what you want to use.

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

Thank you!

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/6 Dodge Charger 69
...there's nothing like using the "Search" link above to solve most of your problems...