2019 Tundra Limited

[tundraman]

Greetings,
I traded my high mileage/trouble free 2008 Tundra for a 2019 Limited. (5.7L). One disappointment. Toyota no longer equips the Tow/Haul package with an auxiliary transmission cooler as in previous years. No outlet adapter on the transmission to let you add one either. The system is described as "integrated engine/transmission cooling". It appears that the warmer is now dual purpose in that it can extract heat when fluid get hotter than coolant. Seems like a downgrade in the towing package to me. The trans oil runs hotter than my 08 which had a cooler (Scan Guage data).
FYI,
bc

 

[Danno]

How heavy and bulky do you tow?

 

[diyjake]

That does sound like a dumb move on Toyota's part, I wonder what the logic is behind that change.

 

[gonefishing]

I had a 2010 Tundra 5.7 and I believe it had the integrated transmission cooler/ac condenser. My 2014 Sierra is a similar in design. Basically the top 20% or so of the radiator is for the transmission and the bottom 80% is the ac condenser. It combines two radiators into one assembly. Try peaking through the grill with a flashlight. You might be able to see the transition between the two (wider tubes).

 

[Astro14]

My 2016 (with the tow package) has a BIG transcooler - integrated with the condenser as above. You can see the thermostat and plumbing on the right (passenger) side of the transmission.

It also has a big oil cooler - with plumbing by the filter housing, which I upgraded to aluminum, by the way.

I think yours is identical to mine.

I think that, while your transmission runs warmer than the previous model, that it is well-equipped with a good cooler for towing.

 

[Astro14]

Originally Posted by diyjake
That does sound like a dumb move on Toyota's part, I wonder what the logic is behind that change.


I don't think that there IS a change...

 

[SZR48207]

Maybe done for fuel mileage reasons? The quicker the atf gets warm, the better it flows.

 

[CKN]

Originally Posted by tundraman
Greetings,
I traded my high mileage/trouble free 2008 Tundra for a 2019 Limited. (5.7L). One disappointment. Toyota no longer equips the Tow/Haul package with an auxiliary transmission cooler as in previous years. No outlet adapter on the transmission to let you add one either. The system is described as "integrated engine/transmission cooling". It appears that the warmer is now dual purpose in that it can extract heat when fluid get hotter than coolant. Seems like a downgrade in the towing package to me. The trans oil runs hotter than my 08 which had a cooler (Scan Guage data).
FYI,
bc


It probably has a thermostat for the transmission that the earlier models did not have. GM (at least on the 1500's) have gone to something similar. Transmission fluid is very stout these days and can take higher temperatures. I wouldn't worry about it.

 

[SEBZX79]

I got a TRD Offroad crewmax last night love the truck. Good luck with yours.

 

[tundraman]

Originally Posted by gonefishing
I had a 2010 Tundra 5.7 and I believe it had the integrated transmission cooler/ac condenser. My 2014 Sierra is a similar in design. Basically the top 20% or so of the radiator is for the transmission and the bottom 80% is the ac condenser. It combines two radiators into one assembly. Try peaking through the grill with a flashlight. You might be able to see the transition between the two (wider tubes).

Already looked. Nada. No takeoff on the transmission for one either. I could buy the takeoff adapter for about $200 but its beyond my DIY ability. Don't tow heavy and will change fluid often so OK for now

 

[klt1986]

Originally Posted by tundraman
Greetings,
I traded my high mileage/trouble free 2008 Tundra for a 2019 Limited. (5.7L). One disappointment. Toyota no longer equips the Tow/Haul package with an auxiliary transmission cooler as in previous years. No outlet adapter on the transmission to let you add one either. The system is described as "integrated engine/transmission cooling". It appears that the warmer is now dual purpose in that it can extract heat when fluid get hotter than coolant. Seems like a downgrade in the towing package to me. The trans oil runs hotter than my 08 which had a cooler (Scan Guage data).
FYI,
bc


I need to look and see how my 2011 is set up. I know it has the ATF heater and I always assumed the transmission cooler was separate piece. By the way, I'm assuming you are from Blountville, TN? I grew up around Bristol and went to college at ETSU.

 

[tundraman]

Blountville tn. Live close to the airport. Your truck will have some auxiliary cooler if its tow/haul equipped. the change was made in this years model. It will be interesting to see how it works for those who tow heavy.
bc

 

[klt1986]

Originally Posted by tundraman
Blountville tn. Live close to the airport. Your truck will have some auxiliary cooler if its tow/haul equipped. the change was made in this years model. It will be interesting to see how it works for those who tow heavy.
bc


It is equipped with the tow package. I may look around it this weekend.

 

[ls1mike]

Looking at the Radiator posted it seems you can add an Aux cooler if you choose to. Not the same thing but my 02 2500HD had a small transmission cooler in addition to the plates in the radiator. I tow 7500 to 8000lbs routinely so I added a larger one 7 years ago.
Towing over the larger passes out west in the summer I have never seen a temp above 200, even on the 10 Mile 4 to 7 percent Vantage grade in 100 to 105 degree heat.

You say no cooler? No lines? That is odd to me, so the fluid does not get cooled at all? I am interested now.

If you are towing often and are seeing frequent high temps you can always add one if the temps are within range and it cools off quickly I wouldn't worry about it.

 

[tundraman]

Originally Posted by ls1mike
Looking at the Radiator posted it seems you can add an Aux cooler if you choose to. Not the same thing but my 02 2500HD had a small transmission cooler in addition to the plates in the radiator. I tow 7500 to 8000lbs routinely so I added a larger one 7 years ago.
Towing over the larger passes out west in the summer I have never seen a temp above 200, even on the 10 Mile 4 to 7 percent Vantage grade in 100 to 105 degree heat.

You say no cooler? No lines? That is odd to me, so the fluid does not get cooled at all? I am interested now.

If you are towing often and are seeing frequent high temps you can always add one if the temps are within range and it cools off quickly I wouldn't worry about it.

Adding one would require purchasing and installing the Toyota spacer with the thermostated takeoff lines. It goes between the transmissions and the warmer module. About $200 for that part alone. Doable if I can find a pro capable of the job. Not many Tundra experts around here. Currently, the engine coolant that warms the fluid serves to remove heat when the fluid gets hot enough. I don't know how hot that is, but it would have to be hotter than the coolant.
bc