1937 Six transmission

Posted by CartRich On 2020/2/2 18:48:40

Based on a past thread or two here and over on the AACA forums, I went to Tractor Supply today and purchased a bottle of "Traveller Ford Tractor All Mineral Oil 90 Transmission Fluid". I helped my father years ago when he added gear oil after removing the floor boards of the car. It had been very low and needed more but it was some standard gear oil to the best of my recollection. My question is should I drain what is currently in there before I add the new oil and if so, how?

I know I usually have some pretty basic questions, and I try to do my homework by looking in my physical copies of the Motors Manual that covers 1937 and the Packard Operation And Maintenance Data as well as the Shop Manual on this site, but sometimes they take for granted that I should have more practical knowledge than I really do.