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M-22 Trans Gear oil Question? has anyone used Valvoline synchromesh???
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03-23-2024, 07:44 PM
Mr. G
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Join Date: Oct 2004
Posts: 467
This is very interesting as I recently used Sta-Lube GL4 85w-90 in a rebuilt M-20. The lable states that it does have extreme pressure additives but will not corrode copper, brass or bronze. Now I don't know if it is OK or not.
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