2019 2020 transmission cooler missing

One interesting thing is I have not seen anyone on here who was able to get a dealer to install a trans cooler on these newer tundras. They claim it already has one with the whole warmer/cooler puck

 

what was the exact overhear condition you observed?? I read and re-read the posts and you point to DTC P0711 which the description states is a malfunction in the sensor - not an actual condition of overheating.
What did I miss? I saw your elevated tranny temps - is that what you’re referring to as an overheating condition?

 

If you compare the following SDS sheets from Mobil, you'll see that WS fluid is very much in the synthetic realm. In fact it has better base stocks than Mobil's own marketed synthetic ATF:

Mobil atf
Mobil 3324
Mobil synthetic
Mobil Dexron VI

https://www.mobil.com/en/lubricants/for-personal-vehicles/our-products/products/mobil-type-f-atf/

https://www.mobil.com/en/lubricants.../our-products/products/mobil-1-synthetic-atf/

https://www.mobil.com/en/lubricants/for-personal-vehicles/our-products/products/mobil-atf-3309/

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

https://www.mobil.com/en/lubricants/for-personal-vehicles/our-products/products/mobil-dexron-vi-atf/

All these have flash points well into the 300F range, even the conventional, non synthetic ATF.

You have to realize also that WS is protected by trade secret. So what is reported on the SDS is only part of the story. They are only listing what the have to based on known hazards they have to report based on HAZCOM law. If you add up the different composition percentages on all the SDS it doesn't add up to 100 and also on some goes over 100.

Mobil looks to be making the WS fluid based on their 3324 ATF. The composition there is listed to show an intentionally vague description. The composition lists the chemical process more than anything. And those processes are typical for synthetic oil manufacturing.

In fact WS and 3324 have better base stocks than anything else in Mobil's fleet.

This fluid is FAR from garbage and FAR from a conventional ATF with a temp limit of 175F shown in the charts thrown all over the internet.

 

Sounds you are the one lacking research on what will or will not void your warranty . by law Toyota would have to prove that the cooler you installed was the direct cause of what ever failure you experience . Like i said before , pick your battles . its not worth it . between this thread and the responses from Toyota you are bound to be made out to look like a joke ... if that hasn't happened already !

 

As per Hayden's installation instructions , you can have the inlet/outlet up , down or sideways . it does NOT matter .. Besides most OEM coolers found on other vehicles have the ports at the bottom .. Anyone who knows transmissions will tell you that line pressure will overcome any kind of air pocket or bubble .. transmissions are not sealed , they breathe like differentials and air is able to escape through the breather.

 

Oh Toyota has already passed all the emails around and made memes about it I’m sure

 

Not going to call. Bought a cooler kit off of @chasenicholas93 . Quicker and easier to just do it and get it over with vs trying to convince a billion dollar world wide company to do the right thing. Besides if they did start putting coolers on again the bean counter that got a pat on the back for eliminating it would have to give his/her bonus or raise back. We wouldn't want to take food out of anyones mouth here especially Toyotas, so just put a cooler in if you feel it is necessary....I do.

 

Unfortunately, I don't feel comfortable contacting Toyota and telling them sgtfluffy16 said my transmission is overheating and demanding them to fix it immediately.

As soon as I have evidence of some kind that there is a problem with my transmission, I promise to join your cause.

 

I stand corrected on what manufacturers recommend. Not knowing anything about transmission line pressure and flow rate, my practice would be to err on the side of guaranteed results.

 

Same here. Outside of a few people reporting the high temp light we have seen nothing to indicate that this will be a giant issue for the majority of 19 and 20 tundra owners.

Additionally, arent the old 4.6’s running without a cooler as well?

 

Everyone is free to handle this situation as they see fit. If you want to worry about it, go for it. If you want to add a cooler, have at it. I’m not going to worry about it. I drive my truck hard and will continue to do so. If the transmission explodes, I have a lifetime power train warranty. They’ll put another one in and I’ll go right back to driving the crap out of it. Have a nice day.

 

If mine blows up, I'm going to buy something with more payload, storage under the back seats and a more logical centre console that can play my iPod.

 

....and spend more time getting warranty work done. That unfortunately is the trade off. If the domestics could build something as reliable as the Tundra I would be next in line to buy one.

 

I think the new Tundra coming out next year will probably meet his requirements.

 

Yeah, that's the unfortunate reality. I don't think there's a perfect truck on the market right now. The other possibility is that the new Tundra blows everyone else out of the water on every front again like it did in 2007.

My brother and my boss both have 2019 Sierras so I will also keep an eye on how they perform.

 

Since 2010, 4.6L with the tow package had the warmer/cooler plus an external cooler in the AC condenser up until 2013. No tow package and no external cooler on 4.6L after 2013.

 

Right? Although, after the efforts to get all the rattles fixed, I hope it lasts for awhile. Now if I can just get these damn front tires to quit shaking, lol.

 

I don't plan to throw a big fuss over this.

Toyota obviously feels it was OK to eliminate the additional cooler and use the coolant/puck exclusively. This is exactly how most passenger car and light truck transmissions were cooled for generations. The ATF was plumbed to a heat exchanger in one of the radiator end tanks. If you wanted extra trans cooling for towing/racing/whatever... you added a front mounted cooler and plumbed it in series AFTER the radiator tank for additional trans cooling capability.

This is 'kinda how I see the Pre-2018's were done. They had both engine coolant AND aux coolers being used.

I still think it's good practice to add the front mounted trans cooler if you plan to tow or run hard in hot climates.

The trans fluid may be perfectly capable of handling the excessive temperatures without the front mounted cooler... but I don't want to be that guy taking the chance and possibly reducing the overall life of the transmission.

Running the extra trans cooler is a "nothing to lose, everything to gain" situation... whereas it's otherwise a crapshoot to run/tow without it... but for the average pavement princess that never pulls a trailer... it probably wont ever be an issue.

 

Well, nothing to lose but the cost of the cooler install, right?

I tow a TT, but my truck will probably have max 50k miles before the transmission warranty ends or I sell it, whichever comes first.

 

I guess that depends where you place the value of your money.
Personally I think the cooler upgrade is small change and easy peasy install.
Much easier and cheaper than smoking a trans outside of the warranty period... while pulling a trailer... 2000 miles away from home.

 

I won't own it outside the warranty period. This truck has already been in the shop for repairs more times in the first year than my previous two Tacomas were in the last 16 years.

 

Damn. That sucks.

 

Currently driving a 2016 4Runner which I bought new. Priors: RAV4, Saturn, Camry etc..
Need more towing power for new TT. Not sure what to buy now. Maybe used 2018 Tundra.

 

How big a trailer are you gunning for? Even if you put a cooler in or get an older truck that had one, you still have limited payload on the Tundra. You can go over it, and the truck will do it, but you wind up in questionable liability territory if you do.

 

Your the exception. My 2020 Tundra has been flawless but my 2018 Tacoma had some issues. Even still, compared to the domestics it's been a treat.

 

Well, to be fair to the Tundra, my Tacomas were in the shop 1 time between the two. Zero for my 2004 in 12 years, and once for the 2016 in 4 years.

 

You can buy whatever you choose, but is any other 1/2 ton truck more power reliable than a Tundra? The others have transmission issues as well as other known problems. It’s your money, buy whatever you’re comfortable with.

 

Agreed. Couldn’t be happier with the “outdated” Tundra after owning a 2018 Silverado where everything on the interior rattled and the transmission shifted like a drunk monkey trying to drive a stick

 

Here is another thing to consider in evaluating this issue...

Toyota may have been testing this change for many years, even while the current production trucks were fitted with a transmission cooler. I don't think anyone just woke up in the morning and said "screw it...I'm gonna ditch the cooler." I also don't think this was something tested only over a few days.

OEMs have a huge number of permutations they test and evaluate prior to going to production. Some tests take years. The trucks and cars you see on a dealership lot are actually 4-5 years old in the eyes of the manufacturer.

It may actually be the case that the WS fluid can not only withstand the heat but so can the transmission.

I think there is a non-trivial amount of bias based on perceptions and expectations. I admit I'm one. I'd like something to manage the thermal stresses on my transmission. However if the transmission and fluid can deal with it, then ok.

I worked for a company that tested OEM brake systems for company and gov't certifications. We had fleets of trucks that were outfitted differently between tires, rotors, pads, calipers, brackets, bearing hubs, and even brake fluids. My God...the tire permutations...Then they were loaded up at discrete loads up to max load. Then we tested in dirt, sand, mud, snow, rain, hot weather and cold weather.

We primarily tested Ford, Dodge, and GM half ton and 3/4 ton trucks.

We got a 1st gen Highlander. It was the companies first Toyota. We were excited.

More than half way (as I recall as I was putting on the front brake systems) through the vehicle system build, they yanked the fleet.

Toyota audited us.

They personally sent a small group of people to install the original brake configuration, install the wheels, and remove vehicles.

We were told via letter a week later that our processes' were unacceptably undisciplined and Toyota could not trust the results. No more Toyotas for us.

That experience very much informed my perceptions about Toyota for the better.