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Discussion Starter · #1 ·
Hi,

I am changing the gear oil on my 2014 Honda Rancher (TRX420FM1 4x4) and am having trouble finding the recommended 80W-90 advertised for ATV's locally. Wondering if I can just use an automotive gear oil? Label states ..."SAE 80W-90 Gear Oil is a multi-purpose gear lubricant designed for API Service Classification GL-5. It is formulated to ensure extreme pressure performance, anti-wear, corrosion inhibition, rust prevention, low pour point, and foam reduction."

Thanks

Rob
 

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Discussion Starter · #2 ·
Hi,

I am changing the gear oil on my 2014 Honda Rancher (TRX420FM1 4x4) and am having trouble finding the recommended 80W-90 advertised for ATV's locally. Wondering if I can just use an automotive gear oil? Label states ..."SAE 80W-90 Gear Oil is a multi-purpose gear lubricant designed for API Service Classification GL-5. It is formulated to ensure extreme pressure performance, anti-wear, corrosion inhibition, rust prevention, low pour point, and foam reduction."

Thanks

Rob
To add to this, label also states..."limited slip differentials for top off only."
 

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here is MY 2 cents
about any gear oil will work , these atv's just DON"T go fast enough to make much heat to worry about oil break down or wear, the ONLY thing you need to have in there LOL
is enough oil to lube the gears well and for it to be clean and of proper temp range so NOT to get stiff on you
there are many folks that fill em with grease thinking it helps on water issue's, I don't value this, though, as grease will unless pressurized filled (which brings its own problems with seals going bad or blown out) but grease alone can have voids in it, offering zero lube and places for water to pond
BUT any gear oil will be liquid like if of right weight and temps for them
and will lobe your gears
again, key, is have clean gear oil of correct level, and you should be fine for yrs
these ain't vehicles that see high speeds that create enough friction from speeds to make heat build up
heck most of the guys on these Honda atv's are putting around at walking speeds LOL
so again, MY opinion, is any GOOD gear oil you like will be just fine, all modern gear oil seems to have limited slip additives in it already too, so not a worry there
I could be wrong, too, but this is my theory on Honda 4x4 atv's
mine is 20 yrs old and been using amsoil gear oil in it since new, changed some yrs several times a yr, some times, once a yr , all depends on how hard I work it, same with motor oil!
I don't go by months or hours on any thing I own, it goes by use and or abuse!
 

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Discussion Starter · #4 ·
here is MY 2 cents
about any gear oil will work , these atv's just DON"T go fast enough to make much heat to worry about oil break down or wear, the ONLY thing you need to have in there LOL
is enough oil to lube the gears well and for it to be clean and of proper temp range so NOT to get stiff on you
there are many folks that fill em with grease thinking it helps on water issue's, I don't value this, though, as grease will unless pressurized filled (which brings its own problems with seals going bad or blown out) but grease alone can have voids in it, offering zero lube and places for water to pond
BUT any gear oil will be liquid like if of right weight and temps for them
and will lobe your gears
again, key, is have clean gear oil of correct level, and you should be fine for yrs
these ain't vehicles that see high speeds that create enough friction from speeds to make heat build up
heck most of the guys on these Honda atv's are putting around at walking speeds LOL
so again, MY opinion, is any GOOD gear oil you like will be just fine, all modern gear oil seems to have limited slip additives in it already too, so not a worry there
I could be wrong, too, but this is my theory on Honda 4x4 atv's
mine is 20 yrs old and been using amsoil gear oil in it since new, changed some yrs several times a yr, some times, once a yr , all depends on how hard I work it, same with motor oil!
I don't go by months or hours on any thing I own, it goes by use and or abuse!

Thanks mrbb! I actually just ordered a couple quarts of the Amsoil 80w-90 Severe Gear so should be good for awhile. The statement about not being made for limited slip differentials (which I think honda 4x4 has) made me a little nervous.
 

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if you really wanted they sell gear oil limited slip additive you can ad to any gear oil
amsoil sell it, as do many other oil makers!
I have been known to add some to mine, if I ever feel or Think I feel/hear some chatter, when working hard towing heavy loads, cheap and doesn't take much to add at fill time and sure won't hurt IMO adding if you wanted,
but most gear oils alone are fine, as again, there isn;t much heat being built up
MOST all riding of atv's is done on ground where a wheel can slip if needed over , say a truck that has WAY more down force from weight and on HARD pavement or concrete , where a tire slipping might NEVER happen and well, that's when weak links in drive trail show up LOL
again, its IMO real easy to over think things, I always stick with change more often than needed than other way,
never had a rear go out in 40 yrs of abuse to them, that was due to oil related issue's
more motors
as they always have good oil in them that is clean and fresh, due to I again, don;t wait for hours or miles to TELL me to change em
you own it, you run it, you know the way its being used, or abused, , big picture, oil is still cheap insurance on long lasting things

the guys that take atv's swimming, well there in a different league on risks IMO and most all know and accept them, so there POM"S are never by any book or time frame either
I kinda gather many don;t last long enough to get to regular PM's before needing work on them LOL
so tear downs and rebuild are more common,and as such many use CHEAPEST oils they can find , that they still feel if OK enough!
if your a guy that takes care of things and wants them to last forever
you do PM's MORE often than recommended and odds are your stuff will last longer due to it!
 

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Hypoid is what to look for in your gear oil choice -----

I don't use regular gear oil at all , I run Lucus Hub Oil on a fresh reseal and bearing job till the oil gets just the least bit milky , then flush and refill with about 25% Lucas Hub Oil then pump it full of marine grease , take it for a quick ride then pump it up again , the axle tubes and swingarm's drive shaft tube are drilled and tapped for grease zerks and pumped with grease also , every 2nd trip I re-grease till I feel restriction , since going this route , I have not had any problems since
 

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Chevron/Delo makes a 75W-90. Full synthetic, good flow in the cold and half the price of Amsoil. I have that in all three of the Hondas.
 

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I use the Honda 80 90 hyphoid gear oil gl4 and gl5 as the book recommends. But I suppose any other brand would do fine. I understand you want to be sure to use or not use limited slip on any application. The engineers design things like that for the oil or grease they recommend so that's usually what I go by.
dc
 

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Hi,

I am changing the gear oil on my 2014 Honda Rancher (TRX420FM1 4x4) and am having trouble finding the recommended 80W-90 advertised for ATV's locally. Wondering if I can just use an automotive gear oil? Label states ..."SAE 80W-90 Gear Oil is a multi-purpose gear lubricant designed for API Service Classification GL-5. It is formulated to ensure extreme pressure performance, anti-wear, corrosion inhibition, rust prevention, low pour point, and foam reduction."

Thanks

Rob
Honda shop sells Honda 80W-90 Hypoid gear oil. There are others you can use; i use Bel Ray because that’s what i grew up with watching Honda race bikes. I keep mine in an industrial pump oil can with a flexible spout so i can squirt a bit at a time into the diff.

149461

i think API GL-5 might be rated for hypoid gear sets but I’m not absolutely sure. Just make sure you match the petroleum, oils, and lubes with their specified uses. For instance, some Harleys require separate oils for both engine and transmission because the transmission.
 
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