Keep your Cool - Mishimoto’s S550 Mustang Automatic Transmission Cooler R&D

Are you guys doing work specificly on the gt350 : w/o track package . Can you explain what happens when the tranny evidently goes into default mode... Warranty VOID??

I'm in for knowing the temperature drop it provides.

RockStang said:

I'm in for knowing the temperature drop it provides.

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Same here. It would have to be considerable for that price.

I had inquired to if Mishimoto was developing a cooler for the new Shelby gt 350 that don't
Have the "Track Pkg"..... I got the real answer Finally today direct from Ford Performance group..... Their about 6 wks away from providing a external cooling system to resolve the overheating problem.... How this will pan out with warranty or recall .... doesn't appear to be know

Every time I romp on my auto just a tad it gets up to 205-210*+ which isn't terrible, but it stays there or just a few degrees cooler no matter how I drive so this cooler would be welcomed lower temps always means longer life.

montreal ponies said:

Hey Sara, any chance of you guys working on a fix for us GT350 owners ? Thx

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We would certainly look into offering one for the 350. If you know of any cars local to DE have them send me a PM.

JWS said:

Is the Cooler in the 50th Anniversary Limited Edition Performance Pack Car with Automatic the same size as the standard 5.0 Auto Cooler?

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The auto that we had in was not a performance pack, so we can not confirm for sure, but I will look into this.

Turbodurbo said:

Are you guys doing work specificly on the gt350 : w/o track package . Can you explain what happens when the tranny evidently goes into default mode... Warranty VOID??

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Unfortunately, we have not been able to get our hands on a GT350 yet. If you know of any cars local to DE have them send me a PM.

RockStang said:

I'm in for knowing the temperature drop it provides.

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joedrt73 said:

Same here. It would have to be considerable for that price.

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Testing data should be up soon, stay tuned!

Turbodurbo said:

I had inquired to if Mishimoto was developing a cooler for the new Shelby gt 350 that don't
Have the "Track Pkg"..... I got the real answer Finally today direct from Ford Performance group..... Their about 6 wks away from providing a external cooling system to resolve the overheating problem.... How this will pan out with warranty or recall .... doesn't appear to be know

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It will be interesting to see what they come up with, and this is certainly something to look into for this car!

5-OH said:

Every time I romp on my auto just a tad it gets up to 205-210*+ which isn't terrible, but it stays there or just a few degrees cooler no matter how I drive so this cooler would be welcomed lower temps always means longer life.

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Agreed! Thanks for the interest!

-Sara

How is the fitment with yall's radiator installed as well?

RedfireV8 said:

How is the fitment with yall's radiator installed as well?

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Our trans cooler will fit with our radiator installed as well as with all stock components.

-Sara

^I figured but just wanted to check! Thank you!

RedfireV8 said:

^I figured but just wanted to check! Thank you!

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You are welcome, never hurts to ask!

-Sara

Any news on testing results yet?

ahl395 said:

Any news on testing results yet?

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Testing is complete as of last week, and there should be another post with results as soon as we finish analyzing the data. I will have an update for you all ASAP, thanks for your patience!

-Sara

Thank you very much, Sara, for all the information provided.

Don't forget, the Mustang is also Germany's best selling sports car in 2015 and there is a growing community of pony car drivers on the other side of the pond, that is interested in good and useful improvements.

Those heat problems are being mentioned in Germany too, thanks to the Autobahn and the possibility of reaching up to about 175mph (with removed software limiter), so a better trans cooler certainly is an interesting part.
So it's no wonder, that this thread here is one of those already monitored in our "sister forum" www.mustang6.de

Saying this, I'd like to thank all you guys here for the numerous valuable information coming out of years of experience with mustang cars the german mustang newbies get here on this board.

Waldo Jeffers said:

Thank you very much, Sara, for all the information provided.

Don't forget, the Mustang is also Germany's best selling sports car in 2015 and there is a growing community of pony car drivers on the other side of the pond, that is interested in good and useful improvements.

Those heat problems are being mentioned in Germany too, thanks to the Autobahn and the possibility of reaching up to about 175mph (with removed software limiter), so a better trans cooler certainly is an interesting part.
So it's no wonder, that this thread here is one of those already monitored in our "sister forum" www.mustang6.de

Saying this, I'd like to thank all you guys here for the numerous valuable information coming out of years of experience with mustang cars the german mustang newbies get here on this board.

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Thanks for the kind words! Glad there are international s550 enthusiasts too

-Sara

Part 3: Test Results

The yellow GT is back in our R&D facility to show us a thing or two about testing trans coolers. Upon the GT’s arrival, we wasted no time getting the pony car saddled with our testing rig.


Mustang GT on the dyno for transmission cooler testing


Mustang GT on the dyno for transmission cooler testing

We couldn’t have asked for a better day for our Mustang transmission cooler testing. We began testing on a beautiful fall afternoon with an ambient temperature of 70°F and 40% humidity. However, this would be no easy day for this brightly-colored beast. With the GT fiercely perched on our Dynapacks, we began testing by applying a constant load to the Mustang. The car was run on the Dyno at 70 MPH in 6th gear, with the dyno producing 60% load, for a grueling 5 minutes in order to ensure the transmission cooler was heat-soaked. We then reduced the load to 36% for another 5 minutes to complete our test.

Results

The Mishimoto trans cooler was able to reduce temperatures by 18°F when compared to the stock transmission cooler. This temperature reduction came with less than 0.5 psi of pressure loss, which is well within the parameters of safe operation. We are pleased with the results of the test and believe this will be a great addition to any S550 that visits the track often. While street driven Mustangs may be fine temperature wise, anyone pushing their car hard at the track may fall victim to high transmission temperatures. Ensuring that trans temperatures stay under control will certainly prolong the life of any automatic transmission.


Figure 1: Results of temperature testing of Mishimoto cooler and stock


Figure 2: Results of pressure testing outlet pressure of Mishimoto cooler and stock

After diving deeper into R&D, we realized that the standard cooler is actually a 6-row design, which is about average in size for a road-driven car. The Mishimoto transmission cooler was designed with racing in mind and boasts a much larger 20-row cooler to increase the amount of cooling surface area. This design makes the Mishimoto cooler a whopping 180% larger than the stock Mustang GT transmission cooler, even larger than previously thought.


Figure 3: Stock and Mishimoto Mustang Trans Cooler Core Volume

Mustang Trans Cooler is now Released

Now that testing is complete, the Mustang Transmission cooler is in stock and available for purchase. Thank you to everyone who has been following along with our progress on this project, feel free to let us know if you have any questions!

As always, Thanks for reading!
-Sara