Farmall H Transmission Oil Recommendation

Jim R · Mar 12, 2013

I have a friend who recently bought a 1944 Farmall "H" tractor. He is changing all the fluids, and in the manual, for the transmission/ differential, the book says to use 90 wt. oil and in another section it says to use a good brand of Mineral Oil. So should he use 90 wt. GL-5 gear oil or should he use a 90 wt. Mineral Oil? Also would this be the same for a Farmall "M" ?? What would be the reason why one 90 wt. oil would be recommended over the other? Thanks for any response!

The Red · Mar 12, 2013

90W gear oil. Last few times I used 85W140. Both the H and M use the same.

dej(Jed) · Mar 12, 2013

(quoted from post at 08:28:56 03/12/13) I have a friend who recently bought a 1944 Farmall "H" tractor. He is changing all the fluids, and in the manual, for the transmission/ differential, the book says to use 90 wt. oil and in another section it says to use a good brand of Mineral Oil. So should he use 90 wt. GL-5 gear oil or should he use a 90 wt. Mineral Oil? Also would this be the same for a Farmall "M" ?? What would be the reason why one 90 wt. oil would be recommended over the other? Thanks for any response!

There wasn't any fancy oil available back when the tractor was new, so what is the big deal these days. Those old tractors survived on a straight weight unadditized oil. GL5.LOL

David G · Mar 12, 2013

I would use 85W-140

souNdguy · Mar 12, 2013

older fords and fergy's needed 90wt mineral gear oil for their rear ends and hydro sumps.

napa 65-205 is a 90 gl1 oil

Farmall H Transmission Oil Recommendation

Jim R

Member

The Red

Well-known Member

dej(Jed)

Well-known Member

David G

Well-known Member

souNdguy

Well-known Member

Similar threads