Transmission ATF WS Fluid Availability

[Julian73]

I agree. On top of this data, the simple fact is that Maxlife is also a Synthetic Blend. The OEM and Aisin are pure mineral based. The Amsoil and Ravenol are pure synthetic. There is zero doubt that synthetic is superior to mineral based lubricants as far as longevity and protection.

Sure, you can just change the mineral based lubricants more often and be just fine. If that is someone's schtick, cool. But to naysay something that is more than likely superior just because it isn't something you want to or feel worth it to do, doesn't make sense logically. A kind of Fanboyism.

I also agree about providing evidence. You can't really prove there isn't something wrong with the oil. All you can do is look back at actual data of users and see if there were problems using it. If there isn't any comfirming data, then the assumption should be made that there isn't...until there is confirmation that there is.

99.9% certain that the Toyota ATF WS and Asian WS are synthetic based

 

[Adrenaline6]

99.9% certain that the Toyota ATF WS and Asian WS are synthetic based

They are not.

Toyota: https://cdn.website-editor.net/6622da50fd3744b3b1560a41005a6921/files/uploaded/00289-ATFWS.pdf

Aisin: https://attachments.priuschat.com/attachment-files/2020/02/182601_MSDS-English-AISIN-AFT-0WS.pdf

This is why most call BS on the "lifetime" claim.

 

[Rednexus]

This is why most call BS on the "lifetime" claim.

For the GX, and particularly the 460, they are 100% not a lifetime fluid. The "A/T TEMP" light doesn't kick on to something like 295F after which the fluid is already cooked. My 470 would hit 225F unloaded pulling a mountain pass at 30 mph in 3rd gear. I've done around $2K in trans upgrades (valve body, lockup switch, bigger cooler) and very rarely exceed 200F and typically run around 170F pulling our 4,000 pound camper.

Conventional fluid that does not handle heat well (but is considered to be "lifetime"), undersized AT coolers, and a unconservative A/T TEMP light can easily result in a cooked trans. Maybe ya'll in the 200 series world have a bigger cooler and it's not as much of an issue, but other Toyota rigs are not so lucky.