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Thread: Mishimoto R&D - 3rd Gen. 5.9L / 6.7L Transmission Cooler Reply to Thread
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  Topic Review (Newest First)
08-05-2019 01:52 PM
MDSWA Here's a link to a video with the Mishimoto thermostat delete instructions. If you think you're going to do the delete, I recommend doing the swap before installing the cooler. Once installed, the upper support bracket is in the way and makes the job harder. Fair warning, the small, slippery thermostat parts are spring loaded and know to fly off to parts unknown if not handled correctly. It took me an extra 15 minutes to find and extract two small parts (spring and cap) that fell between the trans cooler and radiator. I got a pretty solid drop in temps when I ran the delete parts - like 20-30 degrees.
07-02-2019 12:07 PM
Mishimoto
Quote:
Originally Posted by trevdogg67 View Post
My comments on thermostat delete are the same as there are no instructions with cooler. I had to look on this site to confirm proper installation.

I drove my truck around yesterday during the 90+heat stop and go traffic, no towing yet, and saw trans pan temps max at 155. Normally around 120-130.

I'll report back after I go camping at the end of this month with truck all loaded up and towing a boat over Mt Hood.

This is with only the mishimoto trans cooler, heat exchanger is deleted.
Our team is looking to have an install guide card added into the box and we've updated our website with the diagram!


Quote:
Originally Posted by SARSABIOUS View Post
I installed my Mishi bypass in January and felt an update was in order now that summer was here. We are well into the mid-90s every day and the trans temp is still sitting consistantly at 140 degrees as long as I am not in gridlock traffic. In the stop and go, it gets to about 150-155 degrees which I think is still very good. So far, I am very pleased with it.

Here is the diagram again just for fun.
Appreciate your feedback!

Thanks,
Justin T.
Mishimoto Automotive
07-02-2019 10:50 AM
70 SS/L78
Quote:
Originally Posted by Gator1 View Post
Yes there is several ways. Really simple, take your factory lines off and install NPT fittings with barbed end and use new rubber trans hose. You could also run AN fittings and lines, but I'm guessing since you're asking you don't know.
OK thanks, I will take a closer look to see at what point or where i need to disconnect the original lines. I think the one line goes all the back to trans?
07-01-2019 08:00 PM
Gator1
Quote:
Originally Posted by 70 SS/L78 View Post
Finally looking to install my trans cooler I bought last fall. Is there another way to installing the new trans lines besides having to cut up my perfectly good lines? I would like to save them.
Yes there is several ways. Really simple, take your factory lines off and install NPT fittings with barbed end and use new rubber trans hose. You could also run AN fittings and lines, but I'm guessing since you're asking you don't know.
07-01-2019 07:13 PM
trevdogg67
Quote:
Originally Posted by trevdogg67 View Post
My comments on thermostat delete are the same as there are no instructions with cooler. I had to look on this site to confirm proper installation.

I drove my truck around yesterday during the 90+heat stop and go traffic, no towing yet, and saw trans pan temps max at 155. Normally around 120-130.

I'll report back after I go camping at the end of this month with truck all loaded up and towing a boat over Mt Hood.

This is with only the mishimoto trans cooler, heat exchanger is deleted.
So far max temp is 160 at the pan. That was in stop and go traffic with ambient temp of about 85. Not super hot here in Oregon yet and towing is cooler with converter locked up.
07-01-2019 07:03 PM
70 SS/L78 Finally looking to install my trans cooler I bought last fall. Is there another way to installing the new trans lines besides having to cut up my perfectly good lines? I would like to save them.
06-27-2019 02:17 PM
SARSABIOUS I installed my Mishi bypass in January and felt an update was in order now that summer was here. We are well into the mid-90s every day and the trans temp is still sitting consistantly at 140 degrees as long as I am not in gridlock traffic. In the stop and go, it gets to about 150-155 degrees which I think is still very good. So far, I am very pleased with it.

Here is the diagram again just for fun.
06-12-2019 02:44 PM
trevdogg67 My comments on thermostat delete are the same as there are no instructions with cooler. I had to look on this site to confirm proper installation.

I drove my truck around yesterday during the 90+heat stop and go traffic, no towing yet, and saw trans pan temps max at 155. Normally around 120-130.

I'll report back after I go camping at the end of this month with truck all loaded up and towing a boat over Mt Hood.

This is with only the mishimoto trans cooler, heat exchanger is deleted.
06-01-2019 03:31 PM
Sazabizc
Quote:
Originally Posted by thunder03 View Post
Bypass instructions would be a plus. Had a customer bring me a truck to look at. He just installed one and wasnt getting the results he'd heard of. Come to find out he had the bypass all jacked up. Got him all straightened out and now he's a happy camper.

Sent from my SM-G930R4 using Tapatalk


Well Iím glad I wasnít the only one . I guess the way I installed it the frist time I just buy pass the cooler [emoji23] cause my temps were only 10 to 15 degrees cooler then the engine temp and would rise and fall as it heated up and cooled off . Once I opened it up again it was obvious how it installs .


Sent from my iPhone using Tapatalk
06-01-2019 01:01 AM
thunder03
Quote:
Originally Posted by Sazabizc View Post
Good to know. Also made might be a good idea to include a paper showing how to assemble the thermostat buy pass. I got it wrong the frist time and I think someone else did on this forum. I looked All over YouTube and didnít realize there was a separate video showing you how to assemble it. Of course when I was trying I couldnít find the video anywhere but found it after I had already got it to gather and figure it out the next day lol. I donít understand why is a separate video. Think it would be better to be included in the installation video. But thatís just my 2 cents.

The cooler is a definite improvement over stock. Consistently getting 30 to 40 degree temperature drop on the transmission fluid.


Sent from my iPhone using Tapatalk
Bypass instructions would be a plus. Had a customer bring me a truck to look at. He just installed one and wasnt getting the results he'd heard of. Come to find out he had the bypass all jacked up. Got him all straightened out and now he's a happy camper.

Sent from my SM-G930R4 using Tapatalk
05-29-2019 06:54 PM
Tunstall 5.9 Great product thanks for the info !
05-29-2019 05:25 PM
Sazabizc
Quote:
Originally Posted by Mishimoto View Post
Hey Sazabizc,

Thank you for your thorough review of our trans cooler!
We are terribly sorry for any debris that may have been in the cooler and have brought this to our engineers' attention along with our QC team to prevent any chances of this happening again!
If you notice any troubles, please feel free to reach out directly to our team at [email protected] or give them a quick call at 302-762-4501 and we will do our best to help out!

Thank you,
Justin T.
Mishimoto Automotive


Good to know. Also made might be a good idea to include a paper showing how to assemble the thermostat buy pass. I got it wrong the frist time and I think someone else did on this forum. I looked All over YouTube and didnít realize there was a separate video showing you how to assemble it. Of course when I was trying I couldnít find the video anywhere but found it after I had already got it to gather and figure it out the next day lol. I donít understand why is a separate video. Think it would be better to be included in the installation video. But thatís just my 2 cents.

The cooler is a definite improvement over stock. Consistently getting 30 to 40 degree temperature drop on the transmission fluid.


Sent from my iPhone using Tapatalk
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