Toyota 4x4 Truck Rear Differential Gear Oil Weights

Backinblack03 [OP] Well-Known Member

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Brian

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ABS sucks.

Information technology appears that everything else that rotates under the truck calls for

75W-ninety gear oil. Rear stop calls for SAE 90 or SAE 80 or 80w-90, all depending on the environmental temperatures. What do y'all guys run in climates where it will go above or below nothing degrees depending on the day? Hither in Vermont, anything can happen. I'one thousand leaning towards 80w-90 full synthetic for the rear, year long unless somebody has a better idea. Oh, and the lack of rear differential cover is a bit creepy beingness a long time GM man...
I'd get 75-ninety constructed for Vermont... there's barely any difference but eighty might get a little gooey on those cold winter days. Either way it's non something that will make or interruption annihilation.
ARB1977 It's a beaut Clark

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Simply like engine oil. The higher the number the thicker the oil. At opererating temp both are the aforementioned. Just thicker when common cold. 75W90 and call it proficient.
Backinblack03 [OP] Well-Known Member

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Brian

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ABS sucks.

So,

75w-90 synthetic for all 4 boxes? I really don't tow anything, so is there any merit to dropping downwards a lighter weight for better economic system?
I utilise Amsoil

75w-90 severe gear for front/rear diffs, and xfer case.
Amsoil signature series for the auto tranny.
Backinblack03 [OP] Well-Known Member

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ABS sucks.
wolfgang123 Well-Known Member

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ThunderOne Well-Known Member

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Stay with the specified weight. If anything, yous don't want to go thicker if you lot alive upwardly Northward. That just increases the wear. Information technology's the aforementioned concept with motor oil. The colder it is, the "thinner" you lot'll desire the oil to be.
FWIW I apply Castrol Synthetic 75-90 in everything that own't combusting (you can get it at Oreillys). I don't seem to have the "clunky" shifting with the 5 speed anymore either.
Madjik_Man The Rembrandt of Rattle Can

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I asked this same question non too long ago... my mind is still scrambled
http://world wide web.tacomaworld.com/forum/1st-gen-tacomas/281178-diff-fluid-change-3-4-v6-4x4-w-locker.html

I concluded up getting

75w-90 synthetic for everything
Purple Purple for the transmission and transfer case (considering information technology was on auction)

Valvoline synthetic for both the diffs
75-ninety mobil 1 but i become information technology inexpensive at the local whole sale identify for around $eight quart. Mobil one for all.
bamadawg2009 Fellow member

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Richard

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3" leveling kit in front with add leafs in rear with iii" body lift and 35's on the way

Ok so what weight for rear stop with detroit locker? Its getting fourth dimension to modify mine since I had the locker put in and I cant notice anything from detroit'southward website as what weight to utilize.
Madjik_Man The Rembrandt of Rattle Tin can

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Mine has the factory locker in the rear and while the transmission says 80w-90 every knowledgeable poster here and other 4-wheel drive guys told me

75w-90 is fine. Peculiarly for your climate in Florida
I run synthetic

75w-90 in both diffs, tranny, and transfer case. I'1000 in the desert (supposed to be 116 degrees tomorrow) and its seems to piece of work fine for me for around 12 years and 175,000 miles.
I meet y'all accept a 1998. I don't know how many miles you have or how difficult you've 4x4ed, just have you ever listened to your rear diff? After about 175,000 miles, peculiarly if you lot have wheeled moderately, I recommend listening to the rear diff every time you change out the oil. Put it upwardly and allow it run with the wheels turning at idle. As best you tin, stick your ear close to the diff and listen for rumbling/grinding coming from inside... an indicator things are getting pretty worn, Information technology will also generate a little more oestrus. Doesn't mean the diff volition explode driving down the road, only something to be aware of if it gets worse the next time and to somewhen fix. I keep an "ear" on mine because I'k sometimes in some shitball trails very far from... annihilation.
bamadawg2009 Member

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Richard

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three" leveling kit in front with add leafs in rear with 3" body lift and 35's on the fashion

Thx Mike I've got to get on it. I need to put on diff drop and replace diddled out cv kicking I've got both cv axles (new) so I might equally well change oils and everything while Ive got the front end tore autonomously. I wish I had gone with a break lift instead of being inexpensive and going with spacer lift, this is the third set of cv axles in 4 years since the lift was put on.
How much elevator you lot running?
Petrol Well-Known Member

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I don't think we're talking about huge differences hither,

75W-90 five. 80W-xc simply I volition say that the rear end volition "go up to temperature" fairly quickly, fifty-fifty in common cold ambient temps. There's a lot of fluid friction and shearing action with hypoid gears (hence the GL-5 rating) I think for the life of a rear end, clean quality GL-5 rated oil is more important than the cold rating of ii multi weights that are basically 90W when hot. If I recall correctly the manual transmission requires a GL-iv oil considering of the brass syncro's, so using the same oil in all of the axles/gear boxes is not really a expert idea.
In the "for what it'due south worth" category - I run 75W-90 (GL-v) in the front differential, and transfer example, 85W-ninety GL-four in the tranny and 80w-90 (GL-5) in the rear differential. Everybody has their ain opinions and sometimes is piece of cake to commencement splitting hairs over piffling things.
Petrol Well-Known Fellow member

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Past the mode "Backinblack03", I'm running the same truck you lot are, 03, two.7L, v speed.
Madjik_Man The Rembrandt of Rattle Tin

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I've wheeled pretty difficult.
And I've never listened to it.

Cheers for the pointer. Will try to do this presently.
Madjik_Man The Rembrandt of Rattle Tin can

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The synthetics I bought say they're good for a GL-4 and GL-5 application.