5.7L Transmission Cooler Kits

One last remark on the ATF degradation estimate. This article describes how GM is getting that number in their transmissions:
https://www.jstor.org/stable/44723621
The PDF is free to access once you register.
TL;DR 1) bulk oxidation component - how long was the ATF at certain temperature 2) friction degradation component - how well the friction modifiers are doing based on the shift pressure and duration. I can speculate that Aisin is doing something similar.

 

Nick has stated that the MHX has the highest cooling capacity, but that they should all work equally well for the Tundra application. He moved from Hayden to Setrab due to his customer service experience, and added MHX for a high quality, USA-made lifetime warranty.

 

I was able to pull up the ATF degradation on my hacked Trchstream and also the utility. You can see my value is 961 and that's on a 2020 with around 25k for mileage. I'm running a cooler.

 

Do you think it's a function of newer ECUs and not available in earlier ones?

I asked ViktorG, a Toyota tech who said I don't need to reset anything in my 2013.

I swapped 9 quarts today, the transmission feels much better. The fluid that came out after the second drain was not hugely less dirty.



Second drain on the left.

 

Couldn't have said it any better.

 

I’m glad. I read every post about the coolers and install probably 10 times before pulling the trigger. It works so well that I’m looking forward to forgetting everything that I learned!

 

I'm the same way. I don't even monitor my temps anymore no matter if I have a load or not.

 

To be completely honest I have no idea. The reset was something that was never performed at the dealership on any of the vehicles. I would get a copy of Techstream and check if it's available on the '13 and reset it.

 

I have tried TS Version 12,14,15 & 16. None had that value & when I tried to reset it said it was unavailable.

 

Can you see the data stream for the AT?

 

Yes

 

I suspect then it's just not available for the '13.

 

Thanks

 

Do you mind sharing the cost for this?

 

They are on sale for $849

 

I have the original Hayden cooler upgrade on crewmax 2021. I just finished towing my 5Klb boat to FLA a 1200 mile round trip with 4 people and 500lbs in luggage, beach stuff, tools, spare tire etc. Outside temps were 93F. Trans temps at 70 mph were 202F at 75 mph 204F. Engine cooling temps 198F. Surprisingly when it started to rain it only dropped trans temps by 1F? Prior to install I was getting 220F by myself with zero load or trailer lol....... Side note at 75 mph I got 10.4 mpg at 70 mph I got 12.3 mpg. I am usually around 195F unloaded on trans temps.

 

i wish the mhx cooler was all black but thats me lol. says Back order but any idea on possibly when it will ship out id ordered this week
?

 

Early August. Improved Racing does not have any MHX brackets available for the next few weeks.

 

And so it begins.....

 

I just did mine last Wednesday. A tip for installing the hard lines, when twisting them back and forth between the engine and frame, place a hand on each end. One by the alternator and one by the transmission. When it feels like it won't rotate just enough to get into place, rotate in the opposite direction.

By the way, i tried to install the hard lines with the long cooler hoses connected. No go for me. Wasted hours trying to do it. Removed the hoses and had the hard lines in place within minutes.

 

Make sure you use electrical tape to cover the ends of the hard lines. Keeps the dirt out of the lines as you push them into position.

 

The two rubber end covers from the thermostat fit nicely over the hard lines, takes care of one half at least. I installed with hard lines and cooler hoses connected, it was a pain, but doable. I have big hands, hard to fit in small places, so made it work.

The cooler mount step was more relaxing ...

 

Transmission steps next....



Done...

 

Towed the boat up to Lake Texoma and this is the highest temps I hit in the Pan and Torque Converter.

 

232 with a transmission cooler? That doesn't seem right. My last trip I topped out at 220 towing a 30' 6k pound TT.

 

The TC was 232 for a breif period "unlocked" at 76 going uphill.

 

Welcome to the dark side.

And that is one of my favorite beers from across the pond.

 

Normal

 

Yup. That was my thought on it. The pan temps stayed low and the TC dropped quickly as soon as it locked up. My pre-cooler TC temps would get in the mid-240s briefly in the same section of road. Pan would get to the 220s.

 

My temps are very similar. The TC temps spike everytime the TC unlocks. Overall pan temp is the one to be concerned about.