140w gear oil?

1950jdmi

Member
Does anyone know of a place I can buy straight 140w gear oil for my 1938 jd b? I need at least 5 gallons. Tractor supply used to carry it but they no longer do. I am located in SE Pennsylvania. Thanks
 
The cheapest I've found is about $15 a gallon.


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https://www.ebay.com/itm/Miles-Lubricants-M00600803-5-Gal-Gear-Oil-Pail-460-Iso-Viscosity-140W-Sae/333270048937?hash=item4d987160a9:g:MSAAAOSwnVBdL52c:sc:ShippingMethodStandard!66407!US!-1
 
I’d like to use 140 as that’s what the manual calls for. Plus the 90w leaks past the seals too easily
 
When referencing oil specs remember a lot has changed in 80 years, there are better lubricants available today. What once needed thicker oil to maintain a film when hot is not the case with today's more advanced formulations
 
Are you using it for a tractor transmission? I filled my Farmall M with straight 140 gear oil a few years ago. It seemed to turn a milky color quickly which it probably didn't have the moisture shedding qualities of an automotive oil. Drained it and installed 85W-140 from TSC.

Something on TSC oil. TSC gear oil is a rootbeer color. Bought some at NAPA which is a clear honey color. Is the NAPA oil better quality.....I don't know.
 
FIX the leaky seals & gaskets and use 90W. FORD MOTOR CO. got tired of rebuilding rear drive axles on pickups under warrantee so did did some in depth research on oil flow on their heavy duty pickup rear axles. There's video on line showing how the oil flows. It's about 10 times faster than you think it would be. Based on that research they recommended 90W-140 full synthetic across the board in EVERYTHING been almost 10 years ago. I can gaurantee you there is NO flowing oil in your B in cold weather if you have 140W gear oil in it. I'm sure there's lots of "splash lubricated" bearings or bushings in those old tractors. They are starved of oil in cold temps. Depending how you use your B, parades mostly, an even lower viscosity would would probably be better.
 
FIX the leaky seals & gaskets and use 90W. FORD MOTOR CO. got tired of rebuilding rear drive axles on pickups under warrantee so did did some in depth research on oil flow on their heavy duty pickup rear axles. There's video on line showing how the oil flows. It's about 10 times faster than you think it would be. Based on that research they recommended 90W-140 full synthetic across the board in EVERYTHING been almost 10 years ago. I can gaurantee you there is NO flowing oil in your B in cold weather if you have 140W gear oil in it. I'm sure there's lots of "splash lubricated" bearings or bushings in those old tractors. They are starved of oil in cold temps. Depending how you use your B, parades mostly, an even lower viscosity would would probably be better.
 

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