Transmission oil John Deere 40

Anonymous-0

Well-known Member
The manual says 90w oil should be used. This is no longer available, but 85w140 seems like a good compromise. Unfortunately, most 85w140 seems to be GL-5, which is not compatible with yellow metals (copper bearing). I do not know if a JD40 has any yellow metal in its trans, differential, or final drives, but if somebody knows, that would be appreciated. GL-4 oil appears to be quite hard to find.

Any comments on the quality of the Tractor Supply brand (traveler) vs. other brands? What about Walmart's SuperTech?

Any problems doing the kerosene flush recommended in the manual?

Thanks!
 
I "Goggled" 90W gear oil, and got 459,000 hits.
It seems to be readily available.
As for TSC, I have stopped at their store to see
what they had, and was not impressed. They had a good supply of cowboy hats ! It seems to me that
they cater to suburban cowboy/Drugstore cowboys,
folks who own an acre on the edge of town, and
keep a pet horse. When it comes to tractor lubes
somebody must be packaging it for them, and I would expect the motive would profit,not quality.
 
Napa carries straight 90 weight gear oil however it is only in 5 gallon pails. I had to order and wait overnight. I used the better part of a 5 gallon pail in both final drives and the transmission and differential in my MT to give you an idea.
 
Napa does/did sell GL1 in 1 and 5 gallons. 65 205 is for 5 gallon pail I think. napa also sells GL4 from a different source.

Coastal makes a GL4. Autozone should be able to get it.
http://www.petroleumservicecompany.com/13005.html
 
Use straight weight 50 motor oil. It"s yellow metal friendly , cheap and can be found anywhere.
50wt motor oil has the viscosity of 90wt gear oil.
 
I don't think those have any brass bushings in them. There is some name brand gl5 that says yellow metal friendly.
 
B&D is close to right. They have brass washers in the spider gears. I buy generac synthetic 80 90. It will take almost 5 gal. If you decide to use the 50 weight motor oil (it is almost the same as 90w) I would pour a quart of Lucas in the trans-diff. and divide another in the final drives. Probably the cheapest way to go.
 
According to this fellow linked below, GL-5 oil is buffered sulfur-phosphate and doesn't corrode yellow metals, however, it does pose a problem with synchronizers in transmissions. As far as I know, an old JD40 does not have synchronizers; it is a straight trains. GL-4 is nearly impossible to find for a reasonable price (by this I mean it can be purchased as a house brand in a large quantity) where I live, by GL-5 is in abundance, but as 80w-90 and 85w-140.

http://www.widman.biz/uploads/Transaxle_oil.pdf
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top