In Reply to: Re: Gear Oil Specs. from the Source posted by Select O Speed on April 13, 2014 at 10:42:26:
Hard to read but looks the same as the Ford chart below. M-4864-D is the Ford/Dearborn loader oil and the description of the usage sure seems to indicate it is a lower viscosity than M-4864-A.
One of the Ford specifications for which I have been unable to find ANY documentation is M-2C-41. Your chart shows it for use in the PS and SOS box. Have any clue what it's physical chemistry was?
You seem to have a rather comprehensive Ford library. If you get a chance what is the earliest reference you can find to M2C-134x. It appears it came into existance sometime after that shop manual was published. I have always suspected it was a a 1970 vintage product. Also any clue on the differences between the 134A, 134B, 134C, and 134D variants?
TOH
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