[37 Coupe]

Okay before I get a lecture I did search under transmission oil and 600wt and nothing.So if you don't want to answer could you at least tell me what key word will get me there? All I want to know is this.I am rebuilding the transmission right now on my '31.Basically pretty good shape except bearings which I have ordered and the "O" ring shafts for cluster.So with all this new stuff should I use the 600 wt.that Brattons and others sell or a good say summertime gear lube like I use in my '37 Ford.thanks for not berating me in advance.