Re: '39-'41 non-corrosive trans lube availability?
When did the syncro killer stuff come available? I've heard various times not to use ep oil in old transmissions, as it will eat the synchro rings and thrust washers. Ford used ep oil in these transmissions from about '35 I believe.
So my question is, did they relatively resently change the ep additive to a yellow metal killer? I have done lots of trans rebuilds and haven't come across yellow metals that looked "eaten" by something corrosive, normal wear ant tare, and Some abuse. Nothing more.
When did it change?
Thanks in advance.
Martin
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