Who has added a transmission cooler to to 2019-2021 Tundra? (1 Viewer)

[mgrs]

I am considering adding one after hooking up a scanguage and observing the transmission temps fluctuate in real time.

Staying in S4 and Tow/haul mode will keep it under control, but even without a trailer it will hit 260F+ at the TC and 240F+ at the Pan pulling appalacian grades in D. I have not towed anything significant since adding the scanguage, but tow other vehicles on an 18ft flatbed or a 5600lb dry weight travel trailer.

Interested in experiences and what parts were used. The 200-series 5.7l transmission cooler is still available from toyota (PN 32920-60191). Particularly interested if this will bolt up without additional bracket fabrication.

Thanks in advance.

 

[vtl]

I installed one in my 19 Tundra and wife's 22 Sequoia. All OE parts needed for the job from Japan: Pardon Our Interruption... - https://www.ebay.com/itm/286138420790

 

[mgrs]

I installed one in my 19 Tundra and wife's 22 Sequoia. All OE parts needed for the job from Japan: Pardon Our Interruption... - https://www.ebay.com/itm/286138420790

Thanks. Did you consider using 'finned' cooler at the radiator before going for a coolant-driven unit?

 

[vtl]

Thanks. Did you consider using 'finned' cooler at the radiator before going for a coolant-driven unit?

Not sure what you mean? I replaced the puck behind the stock ATF/coolant exchanger with thermostat, like it was before 2019, and all the rest added is dealing with ATF only.

 

[mgrs]

Not sure what you mean? I replaced the puck behind the stock ATF/coolant exchanger with thermostat, like it was before 2019, and all the rest added is dealing with ATF only.

A separate ambient air cooler. I understand the 2011-2018 tundras went to the transmission fluid/coolant heat exchanger, and it was deleted altogether in 2019.

The 2007-2010 Tundras had an ambient air cooler mounted in one side of the radiator shroud.

https://parts.olathetoyota.com/v-2007-toyota-tundra--sr5--5-7l-v8-gas/cooling-system--trans-oil-cooler?srsltid=AfmBOooXwr9oCFCb8lHWdulDLFxd8TMeCJu5VNuoQIeuGnft-lPB7iru

The 200 series land cruisers also have a similar separate cooling unit that was retained throughout the production run.

Thanks again for the parts link, in any event. That would be a much easier solution than mounting a cooler similar to above, OEM or aftermarket. Have you observed any before/after transmission pan temperature differences?

 

[vtl]

Yes, both my coolers are fluid-to-air: Derale 13403

Tundra had crazy high temps, even in cooler ambient temps (~50ish F) and just cruising on a freeway. I forgot the numbers, but torque converter was 270 F easy and the pan was like 230F. Sequoia had it much lower for some reason, maybe extra A/C fan helped, but I installed a cooler in any case. Now both have pan temps under 190 F and torque converter temps barely reaching 200-210, no matter how hard I wheel.

 

[ikarus]

Similar experience to @vtl

I have a 2021. I went with the plug-and-play but expensive Genuine Cooling Systems kit.

Genuine Cooling Systems

The best 2019-2021 Toyota Tundra bolt on transmission cooler kit. Everything you need to install a transmission cooler on your Toyota Tundra in a single box.

genuinecoolingsystems.com

I'm pretty sure you could source everything in the kit for cheaper but I needed to start towing and didn't have the time to figure it all out. I've been towing a 7K lb trailer all over and I'm seeing highs on the torque converter around 230. Unloaded I'm 190-210

 

[Jmunk]

I’ve produced a mounting bracket for Tundras and another for Sequoias that use the Hayden 679 or 689. I have these listed on another forum and on eBay. I’m going to get around to posting in the classifieds. I choose these Hayden’s due to their rated capacities and cost. I prefer the 689 due to the AN fittings and smoother hose routing.

 

[Jmunk]

Additional photo

 

[mgrs]

Yes, both my coolers are fluid-to-air: Derale 13403

Tundra had crazy high temps, even in cooler ambient temps (~50ish F) and just cruising on a freeway. I forgot the numbers, but torque converter was 270 F easy and the pan was like 230F. Sequoia had it much lower for some reason, maybe extra A/C fan helped, but I installed a cooler in any case. Now both have pan temps under 190 F and torque converter temps barely reaching 200-210, no matter how hard I wheel.

Makes total sense now. I misunderstood your original response. I think all roads lead to ambient cooling.

Similar experience to @vtl

I have a 2021. I went with the plug-and-play but expensive Genuine Cooling Systems kit.

Genuine Cooling Systems

The best 2019-2021 Toyota Tundra bolt on transmission cooler kit. Everything you need to install a transmission cooler on your Toyota Tundra in a single box.

genuinecoolingsystems.com

I'm pretty sure you could source everything in the kit for cheaper but I needed to start towing and didn't have the time to figure it all out. I've been towing a 7K lb trailer all over and I'm seeing highs on the torque converter around 230. Unloaded I'm 190-210

Thanks. I looked at the GCS kit- very expensive compared to piecing the requisite parts together, but a clean solution with a great reputation.

I’ve produced a mounting bracket for Tundras and another for Sequoias that use the Hayden 679 or 689. I have these listed on another forum and on eBay. I’m going to get around to posting in the classifieds. I choose these Hayden’s due to their rated capacities and cost. I prefer the 689 due to the AN fittings and smoother hose routing.

I see your sale thread now after searching the Tundra forums. I will PM you there about purchase options. I'd rather source the parts on my own than do a one and done like the GCS kit. key questions were how to mount and what cooler. You may have answered both.

 

[Jmunk]

Makes total sense now. I misunderstood your original response. I think all roads lead to ambient cooling.


Thanks. I looked at the GCS kit- very expensive compared to piecing the requisite parts together, but a clean solution with a great reputation.


I see your sale thread now after searching the Tundra forums. I will PM you there about purchase options. I'd rather source the parts on my own than do a one and done like the GCS kit. key questions were how to mount and what cooler. You may have answered both.

I prefer the Hayden 689 cooler for the use of the AN fittings. The bracket uses factory holes/threads in the radiator support. I can always send more information via PM if needed.

 

[steezy]

No idea what my trans temps were, but when I bought my '21 TRD Pro it had like 20k miles on it so I wanted to bomb proof it. I had read Toyota, in their infinite wisdom, removed the cooler for my year model, so I bought that OEM puck with the coolant lines and thermostat, snagged a Hayden on ebay, some AN fittings, and had my guy install everything for an hour's labor.
That Genuine Cooling Systems looks nice, and has a heavy user base over on the Tundra forums, but I couldn't stomach paying 2-3x (installed).

 

[Jmunk]

No idea what my trans temps were, but when I bought my '21 TRD Pro it had like 20k miles on it so I wanted to bomb proof it. I had read Toyota, in their infinite wisdom, removed the cooler for my year model, so I bought that OEM puck with the coolant lines and thermostat, snagged a Hayden on ebay, some AN fittings, and had my guy install everything for an hour's labor.
That Genuine Cooling Systems looks nice, and has a heavy user base over on the Tundra forums, but I couldn't stomach paying 2-3x (installed).

This is what promoted me to create the CAD file for the bracket, I’m a DIY oriented person. You got a deal on the labor at an hour. It takes me a few hours to install and do a fluid check.

 

[steezy]

This is what promoted me to create the CAD file for the bracket, I’m a DIY oriented person. You got a deal on the labor at an hour. It takes me a few hours to install and do a fluid check.

I’m a good client.

 

[vtl]

This is what promoted me to create the CAD file for the bracket, I’m a DIY oriented person. You got a deal on the labor at an hour. It takes me a few hours to install and do a fluid check.

Sequoia bracket is what prompted me to find another phase in the garage and make it a 240V plug, so my plasma cutter stops tripping breaker annoyingly every 7 seconds Now I need to upgrade my 110V-only welder.

 

[Treetruck]

I’ve produced a mounting bracket for Tundras and another for Sequoias that use the Hayden 679 or 689. I have these listed on another forum and on eBay. I’m going to get around to posting in the classifieds. I choose these Hayden’s due to their rated capacities and cost. I prefer the 689 due to the AN fittings and smoother hose routing.

View attachment 3924308

View attachment 3924309

Will this fit a 2013 Sequoia or do you have a one that will?

 

[vtl]

Will this fit a 2013 Sequoia or do you have a one that will?

Do you need an extra cooling capacity? 2013 has one from the get-go. All this cooler mess is for a few last years of production when Toyota decided to save a couple hundred bucks.