2019 5.7 trans cooler location

I wonder which way is more economical and more friendly to the truck.

 

I bought obdfusion. How do I add atf temp to the dashboard?

 

I think there may be a way to install BUT for $9.99, which is what I opted for, you can buy a 2019 Toyota Enhanced Diagnostics. Go to settings>purchase extras > Toyota. I forget what else is included but ATF temps for sure!

 

I actually found the PIDs for ATF Pan and Torque Converter.

Pan Temp
((((A*256)+B)*(7/100)-400)/10)

Torque Converter Temp
((((C*256)+D)*(7/100)-400)/10)

 

Has anyone looked into swapping their 180 thermostat for a 160? If trans temps are mirroring coolant temps this may offer some help. https://www.mishimoto.com/toyota-tu...oxy-0rWbHenyy-F0KLPGBL9p0zsHB_sYaAqm4EALw_wcB

 

I believe us with the 2019-2020 dont come with a thermostats since it doesn't have a cooler.

 

I’m talking about the engine coolant Tstat.

 

Oh gotcha. That's a great idea actually. I wonder if it will affect reliability or if the engine is more efficient at higher temps.

 

That may be, someone wiser than me may have an answer to that.

 

Yes and Yes. See comments below for impact on reliability. Higher temperature engine thermostats were originally added to increase fuel efficiency and reduce emissions. Running a lower temperature engine thermostat is not an approach I would take to solving this problem:

"The problem with a low temp thermostat then for regular driving is that there are times when the car will be running at a temperature lower than it's design intended. The result is increased wear on the engine's internals. It's essentially the same as if you assembled the engine with clearances tighter than designed for because you didn't follow the directions or your tools were not calibrated properly."

http://www.tuneruniversity.com/blog/2012/04/low-temp-thermostats-whats-the-advantage/#targetText=The problem with a low,wear on the engine's internals.

 

Well that’s a no go then, just a thought. Hopefully Toyota has a better answer for everyone soon.

 

Toyota told me that the warmer is now the cooler and that is that and they aren’t doing anything about it. That came from opening a case.

 

At this point they aren’t going to say they might have been wrong to remove it and do a recall to add it, which would include adding it to trucks that will never tow anything. I wouldn’t be happy about it if I had a 19/20, but only thing to do about it is monitor temps to see if they are right or retrofit one.

 

well, alrighty then.....lol

 

can u guys post your highest steady state pan temps (not temporary Converter peak temps).... i think the most important number would be this...

i think when towing, is is imperative to monitor peak temps and adjust accordingly, but its the steady pan temps that would be a good comparison...

 

I’ve seen some guys have posted that the trans is designed to run 200-220. Would be nice to see Toyota confirm that. Has anyone tried a retrofit yet?

 

Trans temps can swing more than engine. I’m usually around 185-195.

 

Driving 64 MPH up a hill near my house with a nickname OCI Hill, my Transmission temp peaked at 237. For most of the hill it was 220. These are A/T 2 on my device. A/T 1 ran at 220. The outside temp was 43 degrees and the hill is about a mile or 2 long. At the top of the hill the temp dropped to 218 within 3 seconds of easing off the throttle. I wasn’t towing anything, nor was I hot rodding. I am using the Kobra OBD2 scan tool. I guess I’m the next guy to try to make my case for a cooler with Toyota.

 

Man didn’t you hear? The trans cooler has been “optimized” per Toyota. What a joke optimized to run hotter? All Toyota needs to do is come and say yes, we are ok with trans temps running in the 240’s there will be no damage and everyone will calm down.

 

The best you can hope for is for Toyota to bless the installation of a cooler (on your dollar) without voiding warranty. Otherwise it would require a lot of early failures (before warranty) to get a recall. My guess is that only a few owners are aware of or even care about this issue. An official OK on fluid temp would be nice but I don't expect it.
bc

 

So I was able to monitor my 2010 while towing.

went to pickup trailer from dealer about an hour away.

on way there, I did 65-70 (unloaded) in 4th gear and tow haul on to get trans up to temp and a comparison.

outside temp 41-44 degrees. A cool morning.

trmps were consistent with another run to Pittsburgh month prior.

185-195 swing for both engine and tranny. For the most part.

coming home.

temps were consistent and just a tick higher, but never crested 200 on either.

the trans stayed at 195 ish creeped up to 199...stayed there.

this was with approx 7,000 lbs and not aerodynamic.

 

My 2019 trans temps stay rock steady at 220F while towing a 2200 lb camper trailer on mostly flat ground. Ambient temps 40-55F. That’s only towing in 4th gear at 70 mph. At grades it would shoot up to 226-232F. Don’t really care what anyone says... these temps are uncomfortably high. I’m seeing posts of 20-30F less on previous model year trucks in similar conditions. Unloaded on the highway mine stays fairly steady around 210F. This is using a wireless OBD tool with the OBD Fusion app with the Toyota specific app purchase. Temp 1 appears to be pan temp and Temp 2 is torque converter temp from what info I have on this device

 

Those trans temps seems to be 30-35°F higher than older models.

Btw, I was told that Tundra has no engine oil temperature sensor which is kind of hard to believe ... How are you reading the engine oil temp?

 

Just because we don’t have a gauge doesn’t mean that Toyota did not install sensors.

as msbaugh440 wrote, he’s using OBD Fusion with an OBD plug in scanner.

OBD fusion allows you to measure tons of data about the truck.

 

246! That’s ridiculously high. If Toyota is ok with temps like that I’d like to see what’s changed that’s allowing the trans to suddenly tolerate 240 degree temps. I do see the A/T temps mirror engine oil temp at the pan. Problem is there’s no thermostat to speak of, it just keeps rising.

 

If the engine doesn't have any engine oil temp sensor, the ecu won't have that data! First time I've ever seen Tundra engine oil temperature on any site!
Maybe there is a sensor / sender somewhere and he has got the ecu code to read it. However several people on this and other sites have said that there is no such a thing. I'm still searching and was hoping @msbaugh440 knows the secret. Maybe newer models have the sensor!

 

There must be a sensor, I can read it with techstream

 

Has anyone checked the MY2019 Brochure on this issue? It has two separate line items of writing on this issue. It mentions a supplemental transmission cooler as one of those line items and a supplemental engine oil cooler as the other line item. It's much more clear on the issue than the window sticker. It near the end of the brochure where the tow package is defined.

 

honestly I’ve never heard of it not having a sensor. The OBD fusion had a PID for it under the Toyota PIDs so unless it’s spitting something bogus out for the engine oil temp I don’t know how else it would have that option?