2019 5.7 trans cooler location

For owners of 2019+ Tundras that bought them as tow vehicles:
https://www.tundras.com/threads/tra...nitoring-with-ultra-gauge-blue-adapter.58930/

 

Also the OBDLink MX+ works to read transmission temp, you can download enhanced OEM PIDs for free with the MX+. You can also use the MX but it cost 9.99 to download the PIDs.

 

Superior information JohnLakeman. Thank-You, that really helps to understand some more. Source of information? Can we get to it (cost)?

Good place to connect the dots to "Pinning" information. I've just got started on enabling my android version of Torque Pro to read Trans temps. Boy are they High, IMHO. Yes I know Toyota engineers are far smarter than I but it doesn't stop me from trying.

Still perfecting my new PID formula that I borrowed but had to modify because the first reading was exceedingly high. Should finish perfecting that formula today with a fresh cold start. But thus far with about 95% accuracy, I'm seeing in 50 degree ambient weather in smooth easy highway driving 216 degrees at the TC!!! Ouch - I really do NOT like that - I don't care which engineer says its better - I cannot be convinced. It cannot be better than 180. That is my goal. We'll see and I'll report back.

Luck all and enjoy the Hot Toyotas. : ^ )))

 

My source for information about Toyota ATF cooling systems was internet Tundra parts listings. On Toyota dealer of choice site (https://parts.toyotaofcoolsprings.com in my case): Go to "Search All Vehicles">Year/Make/Model/Trim/Engine>Cooling System>Trans Oil Cooler. Follow the list of fitments for the various parts.

You'll discover that all Tundras (3.4L, 4.0L, 4.7L, 5.7L) had air/fluid ATF coolers in the front with no temperature control through 2006. In fact, "tow package" wasn't even a Tundra thing until 2007. From 2007-2009, all "tow package" Tundras continued to have stand-alone ATF coolers without temperature regulation, and non-tow package Tundras were equipped with the warmer/cooler mounted to the transmission (a slight revision from my earlier statement). In 2010, the ATF thermostat was first added with the new 4.6L tow package with ATF cooler built into AC condenser. That configuration was extended to the 5.7L tow package in 2011.

Cost? If you're talking about retrofitting an ATF cooler to a 2019+, I would use as many Toyota parts as possible from the last applicable production year, 2018, and use a cheaper aftermarket cooler and final connections up front. If you use an aftermarket cooler, the parts needed are fairly reasonable. Any significant deviation from that plan or poor execution could result in a transmission disaster imo.

 

Just 1 correction (not that it matters), the change was in mid 10. I had a 2010 model built in May of 10 and had the 5.7 with trans/ac combined cooler.

 

You said that before...I wondered about it, but never followed up because it wasn't important.

Your experience is interesting input, and probably not available any other way except from an astute original owner. I based my comments on the thermostat part link below. Note that 5.7L fitment begins in MY 2011, not 2010. So, if you had needed a ATF cooler thermostat, you would have had an interesting encounter with the parts department. That's one reason they ask now for a VIN when any kind of parts are being ordered.

https://parts.toyotaofcoolsprings.c...9dHVuZHJhJnk9MjAxMSZ0PXNyNSZlPTUtN2wtdjgtZ2Fz

Historically in automotive manufacturing, there have been "running changes" made during a model year. In classic car restoration, part of the game is to determine the VIN range when a "running change" was made to a new, revised part number. Such changes happen for a number of reasons, but usually on an almost identical part, not something as big as changing transmissions (new stock would have had warmer/cooler and thermostat mounted), cooling lines, and ATF cooler/AC condenser. It's very interesting to compare Toyota thinking to the Big Three...they must have thought the changeover was mega-important for some reason.

 

If I don't tow at all and rarely have more than a few hundred pounds in the bed a few times a year, I should be good, right? Hell, I even drive very conservatively.

 

If you don't tow, I think you'll be fine. In fact, Toyota has probably planned it that way for owners that don't tow.

From other 2019+ owners input, I believe for daily driving, you will be looking at about 215-220 deg F max. You'll have to decide if that temp level with ATF WS bothers you. With cooler winter ambient temps in Central Texas, I haven't been able to get my 4.6L/A760E over 190 deg according to my Ultra-Gauge Blue. Beginning in 2019, with no ATF cooler, your ATF "cooler" config is the same as mine; i.e. warmer only.

 

I towed more then 6 times last summer around 5000lb travel trailer and never went above 217 for pan and occasionally hitting 228 and goes down fast on the torque

 

Was that in S4?

 

Yes S4 and tow/ haul , drive between 55 and 60 mph

 

Imagine an overloaded twin-turbo small displacement engine in a towing truck with regular engine coolant temps between 210-230°F with this same Trans cooling setup.

 

I'm in Weird town, couple days ago after 40 miles of driving my 5.7 (2015) in 60ish weather, no rain, it hit 212. So I guess the 4.6 and 5.7 react a bit different to roughly the same environment?

I'm getting used to this new WS higher temp concept (not easy), but those are horrible numbers if it were my 3rd gen 4Runner considering how cool it is, no towing, no stop/go, no hills,just steady eddy highway driving.... uggg.

I'm just gonna have the fluid flushed periodically w/WS if nothing else to sleep a hair better.

 

Our different experience is likely because I haven't gotten that much driving time or distance with ATF temp monitoring yet. I'll eventually get a drive to Houston. Then, it will get a good heat soaking, and I'll know where the ATF temp going to end up. After that, I'll know what I'm dealing with and adjust my maintenance plans accordingly. I can tell you now WS fluid will not be in those plans, only full synthetic ATF will be used.

 

How do you know for certain that WS isn't a full synthetic? Have you had it analysed?

 

So your getting 212 driving a 2015 Sequouia? Doesn't the 15 come with an external trans cooler in the a/c condensor?

 

Any chance this is Toyotas WS. Says it's a synthetic.

https://www.summitracing.com/parts/asn-atf-0ws

 

Flash point is low for a full synth. Here is 2 of my analysis.

 

Sadly, courts and lawyers have pretty much rendered the simple name "synthetic" meaningless as applied to US lubricants. If a lubricant contains any bit of a "synthetic" substance, e.g. polyalphaolefins (PAO), the product can now be labeled as "synthetic".

However, the lawyers apparently did set some rules: In the case of Mobil1, a "full synthetic" labeled motor oil, my son brought a Japanese MSDS to my attention that clearly indicates Mobil1 as having 40-50 percent PAO. (Revelation of trade secrets less important to the Japanese?) A motor oil labeled "100% Synthetic" is all PAO, which is where Mobil1 began carving out the niche. A lubricant that is simply labeled "synthetic"?...well, presumably it has some PAO in it's composition. In the case of WS ATF, the PAO bit that it has is not enough to give it adequate temperature resistance imo, bwdik.

 

Does the 19/20 have an actual Trans coolers yes or no. Simple answer please. Thanks!

 

Yes - crazy design. I don't know exactly how it works. Does the compressor have to operate to warm trans? If so seems counter intuitive for fuel efficiency. I'd rather just have an external cooler with a built in cold fluid by-pass valve fr cooling and let it warm up naturally. : ^ )))

 

It doesn't have an external cooler like it did previous to 19. Toyota says it has cooler but in reality it seems to just be what they used to call a warmer.

 

Kinda like Macdonalds hamburgers, is it 100% beef or "all" beef.

 

No. Just a warmer that also acts as a cooler. The ATF fluid itself does not go anywhere to be cooled.

 

You guys need to watch this

https://youtu.be/Y5TnZsscYb4

 

I wonder what the target temperature is.

 

Classified.

My eyes only.

 

Oh how I wish I lived close by that “test” climb. I’d Offer up my leased 2019 and load up my dual axle trailer with 9,000ish# of crap and a trans temp monitor and run it! I hope someone here can do that and report temps. I find it odd that he wouldn’t state what the “target temp” is for this set up. 250? 260? 270? Damn shame they changed it now... how much could they possibly be saving?

 

His reply isn't giving me a lot of confidence. There's no reason they can't give us an option to add one ( a cooler) without losing warranty.

I wish he'd have said what temps they were hitting pulling max up that hill.

 

Sweers says that Toyota's temperature target is "20 percent lower than the competition's". Yeah...But is that enough?

Maybe if they were using the competition's ATF:

https://mobiloil.com/en/automatic-transmission-fluid/dexron-vi-atf