Front & Rear Differential Oil

[DEERUNNER]

Royal Purple works just fine. 75W-90 is also OK to use.

 

[flyboysgt]

I want to do this also in a few thousand miles. Does the front and rear diffs need any type of additive to it?


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[FrontRange4Runner]

I would use what ever costs you the least. As long as you get the recommended grade and viscosity you should be fine. All of the boutique oils are great, as is Mobile 1 and Toyota. Assuming you are on the proper changing interval, they should all work fine.

 

[BLACK-FL4RUNNER]

I want to do this also in a few thousand miles. Does the front and rear diffs need any type of additive to it?


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No additives required. They are open diffs with spider gears, not limited slip diffs with clutch packs.

 

[Muzzle of Bees]

WTH are you talking about?

This has nothing to do with the transmission. Nothing.

I guess if there are no gears then this is a non issue. I did not know the 4runner transfer case was a CVT type.

 

[1engineer]

I guess if there are no gears then this is a non issue. I did not know the 4runner transfer case was a CVT type.

1. Yes, there are gears in the differentials.
2. No, the differentials are not the transmission.
3. No, the transfer case nor the transmission is a CVT.

You should probably read up on how the 4Runner 4WD drivetrain works before interjecting yourself in the conversation.

 

[Muzzle of Bees]

1. Yes, there are gears in the differentials.
2. No, the differentials are not the transmission.
3. No, the transfer case nor the transmission is a CVT.

You should probably read up on how the 4Runner 4WD drivetrain works before interjecting yourself in the conversation.

I guess you don't know sarcasm when it stairs you down. He is the one that thinks gear oils dont matter. When in fact they do. Or why would they even make the claim?

 

[1engineer]

I would stick with the factory recommended viscosity. Once the temp hits about 40F or below the thicker oil will make the transmission shift harder until the oil gets warm.

I used the 75w90 this on a recommendation from a store for one of my manual transmissions on one of my old 4x4 trucks. That thing shifted too hard after I swapped the fluid.I called the company and complained that their salesperson said it will work fine. They refunded my money.

WTH are you talking about?

This has nothing to do with the transmission. Nothing.

No additives required. They are open diffs with spider gears, not limited slip diffs with clutch packs.

I guess you don't know sarcasm when it stairs you down. He is the one that thinks gear oils dont matter. When in fact they do. Or why would they even make the claim?

I do know when sarcasm *stares* me in the face. I was referring to your previous post (quoted above) you made comparing the operation of a manual transmission to the 4Runner differentials. Changing the viscosity a minute amount in the differentials will have zero effect on the transmission, as [MENTION=65614]Antman[/MENTION] says in the quoted post above. [MENTION=122189]BLACK-FL4RUNNER[/MENTION] furthers the argument in describing the open differentials. Differentials have nothing to do with transmissions in the 4Runner.
Now, if you make a terrible choice and put something with an ultra high viscosity that is extremely temperature sensitive in the differentials and it gets really cold THEN your transmission might have to work harder, but it will still shift normally. The OP asked the initial question wanting to make sure this would not happen and the responses were all good on the recommendations.

 

[HerT4R]

I guess you don't know sarcasm when it stairs you down. He is the one that thinks gear oils dont matter. When in fact they do. Or why would they even make the claim?

:moony:
you didn't use the green text rule man! green = sarcasm! or tossing in random smilies = sarcasm.

next time ask for :help: so you don't get :whip:

Use Toyota genuine LF type gear oil. for transfer case . amsoil has no substitute.

diff viscosity does effect MPG when cold . synthetic oil it is very small however if you use the 5wt higher. like .00039MPG less.

on some vehicles the diff oil is increased from 75-90 wt to 75-140 wt . this is for 100 deg f and higher operating temps. also heavy tow/hauling . the diff does get hot so you do need a higher viscosity. if in below zero temps using the higher viscosity this would cause a much longer warm up . not the 5 wt but using the much higher viscosity like 75-110 wt which some use in Texas on their T4R's..

changing the diff oil is up to how you use it . average driving with some light tows I would do it at the 40K Miles. off road I would do it every year.

I think toyota spec's on this are 75-85wt because of the light loads .. using slightly higher appears to not effect other owners operation and will not cause failures but make failures less of an issue.

as [MENTION=138935]catrains[/MENTION] pointed out, the added weight viscosity of 75w90 vs 75w85 is minimal and may even be helpful rather than harmful as you are dead set on claiming. now please remove bees from muzzle, then speak...

 

[Muzzle of Bees]

:moony:
you didn't use the green text rule man! green = sarcasm! or tossing in random smilies = sarcasm.

next time ask for :help: so you don't get :whip:



as [MENTION=138935]catrains[/MENTION] pointed out, the added weight viscosity of 75w90 vs 75w85 is minimal and may even be helpful rather than harmful as you are dead set on claiming. now please remove bees from muzzle, then speak...

I never used the word harmful. Know one said it is not minimal.
It is noticeable and makes shifting harder when its cold.

 

[HerT4R]

I never used the word harmful. Know one said it is not minimal.
It is noticeable and makes shifting harder when its cold.

ever heard of deductive reasoning aka deductive logic???

if not, that's okay because i will continue using 75w90 Mobil1 synthetic in both diffs and t case without issue.

 

[flyboysgt]

No additives required. They are open diffs with spider gears, not limited slip diffs with clutch packs.

Awesome, thanks. I believe my Tacoma had called for it, that's why I asked. I didn't realize they were different.

 

[Antman]

I guess you don't know sarcasm when it stairs you down. He is the one that thinks gear oils dont matter. When in fact they do. Or why would they even make the claim?

Now now. I don't believe I ever stated that gear oils don't matter, did I?

I stated that your post regarding the shifting of the transmission had nothing to do with the gear oil in the transfer case or the diffs. It still doesn't.

Hopefully you can understand and get over that so this thread doesn't turn into one that [MENTION=66316]1engineer[/MENTION] needs to drive over the cliff...:yo:

 

[1000MPH]

My choice is Delvac.
Popular on the FJ forums and vintage Porsche transaxles.

repost of my opinion from one of the other T/C Diff threads...
"These things don't break. I'd be willing to bet most dealers use whatever is the cheapest bulk gear oil that their petroleum rep carries.
My dealer wouldn't even order the spec'd Toyota product and in the end I'm glad I didn't waste the money.
All of the ones you mentioned will be fine. I went with Delvac from Zoro tools for t/c and f/r diffs due to no LS additive.
If I were to get another 4R today I wouldn't bother changing the t/c or front diff for at least 75-90k miles."

Here's a how-to thread if ya didn't see it...
http://www.toyota-4runner.org/5th-gen-t4rs/117482-front-rear-diff-fluid-change.html

 

[Muzzle of Bees]

ever heard of deductive reasoning aka deductive logic???

if not, that's okay because i will continue using 75w90 Mobil1 synthetic in both diffs and t case without issue.

I don't care if you use olive oil. I am pointing my experience. Lower temps caused hard shifting in colder weather until the oil reached a higher temp.

 

[BLACK-FL4RUNNER]

:redbrick:

 

[HerT4R]

I don't care if you use olive oil. I am pointing my experience. Lower temps caused hard shifting in colder weather until the oil reached a higher temp.

ever thought of changing your name to broken record? it seems fitting.

 

[nevada]

I don't care if you use olive oil. I am pointing my experience. Lower temps caused hard shifting in colder weather until the oil reached a higher temp.

not because of a 5 weight difference in gear oil.




to the OP, on top of the recommendation to use the 75-90, I suggest you open the FILL plug prior to draining. sometimes they can be very hard to remove. you will want to make sure you can refill the diff after it gets drained.

 

[NZDZRT]

Open Diffs?

I read the comments about no additives needed because they are open diffs. On the TE, they have a looking rear diff. Would an additive be needed on these? Also, living in Phoenix, I am inclined to go with the higher weighted viscosities. Great thread, some good info on here! :nod:

NZDZRT

 

[BLACK-FL4RUNNER]

No, you do not need any additives with the rear locker.