Fluid for transmission

Jim Paterson · Jan 23, 2012

I have a '44 H and will be changing the fluid in the spring. What is the recommended fluid to use when replacing it? I will also probably clean it while I'm at it and I've been told to fill it with kerosene (six gallons) and drive it around a bit then empty it. Am I on the right track?

Thanks.

Zachary Hoyt · Jan 23, 2012

I believe that 80/90 is the norm and 85/140 is also an option. Certainly the kerosene is an option but you may not need to do that if it is not really dirty in there. I don't think you'd need 6 gallons of kerosene if you do decide to go that route, I think a couple of gallons would be enough since it will slosh around much more than gear oil.
Zach

Jason the Red · Jan 23, 2012

I've read where kerosene can be used to clean it, but it really shouldn't be necessary.

Ellis Kinney · Jan 23, 2012

Jim; There will be 50 years of crud at the bottom of the transmission case. If you want to get a lot of it out, manufacture a scraper on a piece of steel and rake it out through the pipe plug. I have done this on my M and it works fairly well. I was able to pull out about a quart can full of junk. Good luck, Ellis

gbs · Jan 23, 2012

don't think i would try the kerosene and driving because it's going to put a lot off that crud,metal fillings and what ever else into suspension right into the bearings unless you remove the cover and wash it clean,other post has it right scrape as much out as you can thru the drain hole that will let you see if it's bad enough to flush,as for oil if your not in to cold of an area use the 140 gears will run quieter and don't clash as harsh when shifting, just what i have found to work for me

Dean Olson · Jan 23, 2012

I use 85-140 gear oil, works great.

I drained old sludge had to poke around in the drain to get the 1" of crud out of the way.

I then put in 5 gallons of diesel, a lot cheaper that kerosene. I drove around for a few minutes and let it sit for about 2 weeks. 2 week time interval was only because I work on my tractors in my spare time. Diesel was filthy when I drained it, I also poked around with a piece of wire and got as much sludge out as I could. I put in a fresh 5 gallons, drove around for another 5 minutes and let that sit over night. 2nd batch came out with very little discoloration. I then replace the bad gaskets.

I'll save the relatively clean diesel for another cleaning. Dirty batch will get used up starting burn pile or camp fires.

This cleaning method will show every weak gasket as they will leak a lot. I'm ok with that as I want to replace them anyway.

ejr-IA. · Jan 23, 2012

I take the PTO out and reach in and drag all the crude out and flush out.

gene bender · Jan 24, 2012

I use Diesel drive around and flush it has worked just fine then i like the 90-140 or even straight 140 if i can find it.

DanR · Jan 25, 2012

I agree that kerosene, crud, and driving around is not a good idea. Get one of the air/solvent parts cleaner and clean out the crud that way. The long snout on the gun will reach about everything in the transmission.

Fluid for transmission

Jim Paterson

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Zachary Hoyt

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Jason the Red

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Ellis Kinney

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gbs

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Dean Olson

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ejr-IA.

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gene bender

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DanR

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