Haas

Well-known Member
I went to NAPA to get a 5 gal can of 80W-90 gear oil today. The can I got is labeled 90 gear oil, but the NAPA guy said that it is 80W-90 gear oil and he showed me that on his computer. It is NAPA number 65-205. When I got it home, I read the label and it says it is GL-1 and is for non EP (exteme pressure) applications. This is for use in letter series tractors and my IH-140. I'm thinking I'm going to take this back, because I think I should be using something rated GL-4 or 5 which is for EP applications. He did not have anything in his small store that was labeled 80-90W, but I looked that up on the internet and I think it would be NAPA number 75213. Should I use what I got, or take it back??
 
You can fill about anything in the old tractors and be OK. Last H Tranny/rear end I filled was 85W-140 I believe.
 
Use the GL-1 oil! There is no gearing within a letter series or a 140 tractor transmission that remotely approaches EP loading conditions (eg. sliding contact hypoid gears).
 
My book calls for universal hyd. oil in everything, but the engine. You will find hyd. oil cost less then gear oil. I would take it back. Go to your bulk oil disturbter and get a name brand of hyd. oil. Even big tractor any more use hydraulic fluid where the hydraulic system, transmission, differential and wet brakes are all together. That 90W gear oil is to heavy. Would take all the horses the engine has just to move it in the winter.
 
That tractor is a 140, essentially the same tractor as the 1939 Farmall A, with some upgrades. Those transmissions are known to be noisy from the factory, the best oil to use is 80W140 or even straight 140 in a warm climate it is not too heavy. The only IH tractors that need hyd oil are the ones with a torque amplifier, and those have gear clash when shifting due to the equivalent SAE 10 wt, 20 wt or 10W30. There are still 10s of thousands of Farmall letter series tractors using gear oil -- I have 5 of those and 2 with TA's that use hydraulic fluid.
 
(quoted from post at 21:05:00 10/31/12) I went to NAPA to get a 5 gal can of 80W-90 gear oil today. The can I got is labeled 90 gear oil, but the NAPA guy said that it is 80W-90 gear oil and he showed me that on his computer. It is NAPA number 65-205. When I got it home, I read the label and it says it is GL-1 and is for non EP (exteme pressure) applications. This is for use in letter series tractors and my IH-140. I'm thinking I'm going to take this back, because I think I should be using something rated GL-4 or 5 which is for EP applications. He did not have anything in his small store that was labeled 80-90W, but I looked that up on the internet and I think it would be NAPA number 75213. Should I use what I got, or take it back??

65-205 is GL-1 90w mineral oil. good stuff for old tractor trans/rears.
It is not 80w-90 gear oil. 80w-90 is thinner among other things.
I use 65-205 in my early Fords with a pump in the belly..
on other Fords, Farmalls, and JD with no pumps, I use either
65-205 or modern 85w-140 in the rear/tranny.
(can't find straight 140 here, or I would use that to tame old gears)
 

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