Automatic Transmission Fluid

UP Oliver · Oct 19, 2012

I have an Allis Chalmers 1971 loader with about a one and three quarter yard bucket.

I bought it some time ago and need to change my transmission fluid/filter. I have the same problems with all my old tractors and equipment, and that is that the description in the manual for the type of fluid I need cannot be found in a store; at least I can't find them. I get irritated with all the salesmen behind the counter telling me that what they have will do the job when I know they have no idea what they are talking about and just want to make the sale.

Anyway, my manual says to use "Dextron Automatic Transmission identification number (B-10100)." I can use "automation transmission fluid Type C-2" if I am going around above 0 F, which I will always be doing.

I don't know what to buy. I don't see B-10100 or Type C-2 on any container I have looked at, and wondered if there is anyone willing to give me some advice on this topic.

Thanks.

36 Coupe · Oct 20, 2012

Dexron is the proper spelling,no T in the word.There are 5 types of dexron fluid in use now.Saw the same mistake in a wood splitter manual.Dexron is a GM trade mark.

36 Coupe · Oct 20, 2012

Conoco Phillips makes a C 3 fluid that replaces C-2 and C-1 types used in Allison transmissions and hydralic systems.

MSM · Oct 20, 2012

While the filter is off, you could drain the reservoir to get as much of the old fluid out as possible and change over to a regular type hydraulic oil, or universal tractor fluid. Either one will mix with what is left in the system without problem. I have changed all my old tractors over to UTF,for hydraulics and 15-40 for the engines. 2 barrels of oil in the shop,instead of multiple jugs and bottles to keep track of which one takes what.

farmer boy · Oct 20, 2012

Isn't new Dexron fluid backwards compatible?

Suffolk1 · Oct 20, 2012

I have wondered about a similar question. Have an old (mid 60's) Gleaner combine. It has hydraulic lift cylinders for the header, the reel, the power steering, and for an adjustable sheave for variable ground speed. There are no wet clutches or transmission elements associated with the hydraulic system. I believe the hydraulic pump is a gear type pump. The owners manual states to use "Type A" automatic transmission fluid. Why? Was universal hydraulic fluid not commonly used at that time? Could the "Type A" automatic transmission fluid be flushed and replaced with universal hydraulic fluid at this time? If not - why not? I am aware that Type A was replaced by Dexron then Dexron II, then Dexron IID, then Dexron IIE, then Dexron III (which is backward-compatible) and now by Dexron VI.
It would be less costly and simpler to convert to using a universal hydraulic fluid, but are there drawbacks or something I am missing?
Can someone please clarify this issue. Thanks.

36 Coupe · Oct 21, 2012

I have a wood splitter that uses AW 32 fluid or hydraulic jack oil.You can use dexron but not in a mix.We had 4 different hydraulic fluids at the JD shop I worked at.The night shift put the wrong fluid in a back hoe.All the control valves locked up.Hydraulic jack oil has a ripoff price on it now.My small splitter take 3.3 quarts of oil.I would use Dexron if I change it.

Automatic Transmission Fluid

UP Oliver

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36 Coupe

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36 Coupe

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MSM

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farmer boy

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Suffolk1

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36 Coupe

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