Choice of Gear Oil - Toyota 4Runner Forum

Urbanite · 04-30-2021, 03:01 PM

I'm getting ready to change my rear differential oil and was wondering if this would work? If I buy 7 quarts, it's free shipping and would be enough for 2 oil changes.

85W90 Hypoid Gear Oil - Liqui Moly LM20010 | FCP Euro

Also, locally someone is selling Toyota factory's gear oil for a great price, but it's for an LSD and mine is not. Is it OK to use LSD gear oil in a non-LSD differential?

phatcheeks · 04-30-2021, 03:34 PM

The rear calls for straight SAE90 gear oil. Its kinda hard to find in stores so most people just use 75w90 which is the same for front diff and transfer case. Not sure about the 85w90 for the rear.

montijo505 · 04-30-2021, 03:53 PM

I use Mobil 1 75-90 in front and rear diffs. I buy it at Walmart they have the best price. You need I believe 5 quarts for front and rear. T case I run the Toyota stuff.

Maybe someone who has used the products you linked will come in.

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rdruss · 04-30-2021, 05:16 PM

The oil you are considering says for transmissions that require Gl-5. Doesn't mention differentials. I would stay away from for diffs.
LSD gear lube fine in non-LSD.

phatcheeks · 04-30-2021, 05:41 PM

Quote:

Originally Posted by montijo505

I use Mobil 1 75-90 in front and rear diffs. I buy it at Walmart they have the best price. You need I believe 5 quarts for front and rear. T case I run the Toyota stuff.

Maybe someone who has used the products you linked will come in.

Sent from my iPhone using Tapatalk

Interesting. My manual says 75w90 for the transfer case

montijo505 · 04-30-2021, 06:14 PM

Quote:

Originally Posted by phatcheeks

Interesting. My manual says 75w90 for the transfer case

Yeah, I’m just paranoid. Plenty of people run the Mobil 1 75-90 in all three (both diffs and tc) with no issues. I’m up at 165k so just weary of replacing it with something new.

That being said I’m a weirdo that runs all Toyota fluids for everything, except the diffs lol.

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xtremewlr · 04-30-2021, 06:39 PM

I use this in both diffs and the tcase - Amazon.com: Red Line 57904 (75W90) Synthetic Gear Oil - 1 Quart: Automotive

Urbanite · 04-30-2021, 07:02 PM

This is the right stuff for rear diff, cheap and could last for a long time (5 Gal). But never heard of this name:
GL-5 SAE 90 Heavy Duty Automotive Gear Oil - 5 Gallon Pail (18L - 4.75 GAL) - Walmart.com - Walmart.com

EDIT: I searched for manufacturer (SINOPEC) and it looks like this is a Chinese state owned company. Would you use a Chinese fluid? I know everything is now made in China, but with fluids I'm a lot more conservative.

xtremewlr · 04-30-2021, 07:53 PM

Quote:

Originally Posted by Urbanite

This is the right stuff for rear diff, cheap and could last for a long time (5 Gal). But never heard of this name:
GL-5 SAE 90 Heavy Duty Automotive Gear Oil - 5 Gallon Pail (18L - 4.75 GAL) - Walmart.com - Walmart.com

EDIT: I searched for manufacturer (SINOPEC) and it looks like this is a Chinese state owned company. Would you use a Chinese fluid? I know everything is now made in China, but with fluids I'm a lot more conservative.

I wouldn't use it, personally.

There's really no reason not to use the same 75w90 gear oil in the rear that you use in the front and tcase. Unless you get different gearing and/or a locker and the installer tells you to use something different that is specifically required by the gears/locker.

SA-Overland · 04-30-2021, 09:27 PM

Valvoline 75w-90 full synthetic. Never failed me!

Billynath1988 · 05-02-2021, 01:07 PM

Probably completely overkill but the rear diff is a weak point so why not,

I have been using Redline HD shockproof for the last 15k of offroading and road tripped miles with great results. Changed it recently and it came out looking as good as new.

Swipter · 05-02-2021, 01:57 PM

I used the amzoil version because you can get it in collapsible quart containers so I don't need a pump to put it in.

Edit: This was for my 5th gen, 75w 90.

FordF150 · 05-03-2021, 11:13 AM

I used Vavoline 75-90 non synthetic. I plan on doing it again at 70,000m miles as it's a simply job.

Synthetic is so overrated. Conventional nonsynthetic Valvoline was all the parts store had .

three quarts and you are done in 15 minutes.

triethylborane · 05-03-2021, 11:31 AM

Quote:

Originally Posted by FordF150

I used Vavoline 75-90 non synthetic. I plan on doing it again at 70,000m miles as it's a simply job.

Synthetic is so overrated. Conventional nonsynthetic Valvoline was all the parts store had .

three quarts and you are done in 15 minutes.

Back again?

leonp24 · 05-03-2021, 12:51 PM

Quote:

Originally Posted by FordF150

I used Vavoline 75-90 non synthetic. I plan on doing it again at 70,000m miles as it's a simply job.

Synthetic is so overrated. Conventional nonsynthetic Valvoline was all the parts store had .

three quarts and you are done in 15 minutes.

CaptSolo or CaptF150? All you need to do is get some quality synthetic oil to stop all of your oil leaks. And some proper WS for your WS transmission.

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