Automatic Transmission Fluid Cooler. ??

[Sithspawn]

Yeah, we used brass fittings for our connections. I also noticed that you are using worm clamps with braided stainless lines. Not really the best way to do that. You are supposed to use the appropriate ferrules for braided stainless line. Worm clamps won't bite into the stainless well enough.

[Sithspawn]

Update: We tested out the airflow modifications at the track last night and we are exactly where we want to be: temps peaked out at 221 degrees Fahrenheit at the end of the last session...after we pulled into the pits. As long as the car was moving, the temps were at 210 degrees coming out of the transmission and 191 degrees on the return (19 degree delta). As soon as we slowed down and air was not moving through the cooler, the temps climbed up to the aforementioned peak.

One other tidbit I've been meaning to write up is about pressure. In an earlier post, I mentioned that the pressure coming out of the transmission in the stock configuration was 8 - 10psi peaking at 13psi. Stock return pressures were 7 - 10psi. With our cooler installed using -6 A/N line (same size as the stock lines), pressure coming out of the transmission is 11 - 13psi peaking at 25psi and the return pressures are 5 - 7psi peaking at 12psi. As you can see, the supply pressures are higher due to the increased restriction of the added line and cooler while the return pressures are lower than stock. Without testing and verification, I would be wary of adding additional restrictions to the system. You could probably get away with it, but not knowing would bug me personally.

Overall, I am pleased with the performance of this system. Hopefully I'll be able to get a vendor account in the next few weeks and have this available as a kit for those that would like the convenience of a prepackaged kit with detailed instructions. I know from experience that sourcing components can be a pain and often costs more than you anticipate.

[midnight23]

^ met these guys last night at the shootout and saw the car in action, never knew how hot those automatics got before talking to you both.

[Sithspawn]

Originally Posted by midnight23

^ met these guys last night at the shootout and saw the car in action, never knew how hot those automatics got before talking to you both.

It was good to meet you last night. I ended up running a personal best on that track last night (beating out my old personal best held by my WRX with 330hp and a good bit of suspension work). These cars are quick, but they do run hot.

[Tye300]

@Sithspawn, are you still using the stock WS fluid?

[MmmHamSandwich]

Originally Posted by Sithspawn

Hopefully I'll be able to get a vendor account in the next few weeks and have this available as a kit for those that would like the convenience of a prepackaged kit with detailed instructions. I know from experience that sourcing components can be a pain and often costs more than you anticipate.

Let me know if you start offering kits. Any early adopter specials might be neat. :p

[Sithspawn]

Originally Posted by Tye300

@Sithspawn, are you still using the stock WS fluid?

Actually, I added Redline D6 transmission fluid to replace the fluid that was lost when I took my sample for analysis and when splicing in the cooler lines as well as making up for the additional capacity due to the cooler and lines. All in all, it was about 1.5 qts of Redline with the rest being the factory fill.

Speaking of analysis, I just received the results today and attached them below. Blackstone indicated that I can run the fluid to 30k. As you can see, the viscosity is already on the low end of the acceptable range (bottom quarter) with only 1 track day and a couple spirited drives on it with the factory cooler setup. So, while it still has life left in it, it's not 48k worth of life left in it.

[Tye300]

Originally Posted by MmmHamSandwich

Let me know if you start offering kits. Any early adopter specials might be neat. :p

I would be interested in this also.

[86SPEED]

I need to get mine changed ASAP.. i know mine is bad, It has had 7-8 trackdays overheated enough during 1 trackday that it tripped the light. couple handfuls of AutoX, countless runs up and down Big Bear mountain.. now the SC.. yeah it needs changing.. ill start looking into cooler options, and then finally trans fluid.. i was under the impression from my research is only WS can be used, but since i see the redline option i can look at that now also

-Thomas

[nlowell]

Is the RedLine D6 fluid that much superior to the Toyota WS? I ask because I will be doing a fluid swap next week when my new AT Valve Body is installed. Right now I have 6 quarts of WS ready for the swap but if D6 is that much better then I might reconsider.

[Sithspawn]

Originally Posted by nlowell

Is the RedLine D6 fluid that much superior to the Toyota WS? I ask because I will be doing a fluid swap next week when my new AT Valve Body is installed. Right now I have 6 quarts of WS ready for the swap but if D6 is that much better then I might reconsider.

Considering that you have the WS fluid already, I'd just go ahead and use that. I'm not a chemist, but as an engineer, if the fluid meets the specifications for the application, it is fine. Redline D6 meets WS specs and is therefore an acceptable substitute.

[Tye300]

@Sithspawn, did you notice a difference in the two fluids?

[Sithspawn]

Originally Posted by Tye300

@Sithspawn, did you notice a difference in the two fluids?

Not really. Besides, I only have about 25% Redline and 75% OEM fill.

[snidd111]

Let the cutting begin!