Sealed Trasmission fluid change

Gotcha. Ya I would agree, servicing the trans is cheaper in the long run to your point.

 

See everyone, this is a good fucking post. Yet some of you knuckleheads would rather ignore real data, like above, because some dipshit youtuber or worse yet, a friend of your daddy's uncle, says change it.
I don't change it either and the worst thing you can do is flush and fill.
If you have a half a brain, heed the advice above. Drive the bitch for 250/300K and if she goes get a used transmission and keep going.

 

Both my buddies have identical 15' TRD sports. Both experiencing trans issues. Slipping, flares, delayed shifts etc @ ~120k miles. Both don't do a lick of maintenance, engine oil change and air filters. I like workin on my stuff, mostly cause I get bored, so I'll keep up w my drain n fills.

 

Where does this “sealed transmission” nonsense come from anyway? It’s not sealed. It has three different plugs and the gasket doesn’t even have RTV.

 

Somehow not having a dipstick means sealed for most people

 

What exactly is your mechanical understanding? What is your level of education and training? What are you basing this opinion on? What science tells you that engine oil needs to be changed(were not debating this, right) but transmission oil, which for all intents and purposes, is exposed to the same general abuse such as heat(the real killer), temp cycles, oxidation, contamination, etc. sorry, im not really following your logic.

 

I design high pressure CVT (hydrostatic transmission) for off highway mobile equipment. Think cranes, pavers, dozers etc.
The Tacoma is a very light duty application for transmissions, even towing.
I know a bit about the subject as I have been doing this for 30+ years.
You can believe what you want but the post I quoted is realistic. Changing fluids too often is just bullshit.

 

What's your definition of sealed? Lol

 

Securely or permanently closed.

I think the word “sealed” started being used to describe transmissions that automakers said would never need servicing, to give the associated aura of something that would never be touched.

Something that I can easily open with the turn of a wrench doesn’t seem sealed to me. And the fact that there’s no sealant applied…feels like something not very sealed

Words are fun.

 

To be fair, even under like conditions of say regular truck usage of towing and hauling, the "unsealed" manual transmission recommends service of ever 30k miles while the "sealed" automatic transmission has none.

Based on average miles driven of 12k/year and average car ownership of 8.5 years you in theory would never need to touch it. Then you have low mileage goombas like me that won't reach 120k miles until like 20 years.

 

It’s totally a semantics quandary for me, I get that the interval is much longer on a “sealed” transmission.

 

I would say drinking a bottle of water and putting the lid on is a sealed water bottle lol. It doesn't leak anyway. Toyota seals the trans for oil longevity. Oxides, oil, something something nitrogen is leftover, something something oil lasts "forever"

 

What he said.

A 60-80k drain and fill is super easy and something I have always done. Never had problems.

 

For what it’s worth I only consider a bottle of water sealed when it’s never been opened, the cap is on securely with its protective collar. Once you open it you break the seal. When you put the cap back on it’s closed but not sealed. Same for a can of Pringles.

 

Seal means "an airtight enclosure". Which is the whole point of Toyota sealing the trans. No air, no oxides, longer oil life. But I get what you're saying lol.

 

No air? Then why do sealed transmissions amd differentials have air breathers? They work both ways.

 

I thought they were ones ways?

 

Nope. Cannot be, otherwise vaccum inside would suck stuff past the case seals.
That's why you extend the rear differential breather. Differential heats up as you offroad, hot air goes out. Hit water while wheeling, differential cools off, pressure drops.
Nature abhors vaccum. Either clean air will get sucked in from the extended breather, or water thru the submerged breather, or water past axle seals, if breather is plugged with mud.
Hello chocolate milkshake, goodbye gears.

 

So Toyota only used a one way breather in the rear diff? I'd find it hard to believe Toyota with kaizen would use a diff breather for the trans, but maybe.

Truth be told I have no idea lol