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Old 07-01-2019, 01:11 PM   #1
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Transmission Cooler

I hope this makes it run much cooler. I will replace the thermostat at the same time. It should not get as hot as it does going up long grades.

2003 TC2000 FE 5.9 ISB with Allison AT545.

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Old 07-01-2019, 01:31 PM   #2
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Good luck with the mod! 545s need all the help they can find...
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Old 07-01-2019, 03:23 PM   #3
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That looks kind of small, but pics don't always represent truth.
What are the dimensions, if you know?
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Old 07-01-2019, 03:42 PM   #4
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Did this to my 28 foot t/c 2000 1991 5.9 at 545 here is the link do not know how well it works yet as i just got it running . http://www.skoolie.net/forums/f39/tr...a-21810-2.html
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Old 07-01-2019, 03:46 PM   #5
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I've got a REALLY sweet Earl's cooler from Tango to put on my bus with a 545.
Mine didn't come with a fan but I'm adding one.

The one pictured looks to be of a similar size but hard to tell.

Should be a great mod though!
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Old 07-01-2019, 06:19 PM   #6
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Just make sure the inlet and outlet are big enough for your transmission's hoses. Most coolers intended for cars have connections much too small to be useful for a bus transmission. When I added a cooler to my HT740 to reduce its heatload into the engine coolant, I had to use a big Thermal Dynamics one because it was the only one with 1" ports.

John
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Old 07-01-2019, 06:45 PM   #7
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Quote:
Originally Posted by Iceni John View Post
Just make sure the inlet and outlet are big enough for your transmission's hoses. Most coolers intended for cars have connections much too small to be useful for a bus transmission. When I added a cooler to my HT740 to reduce its heatload into the engine coolant, I had to use a big Thermal Dynamics one because it was the only one with 1" ports.

John
This is a Cummins 5.9 with a at 545 so the fittings are -8
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Old 07-01-2019, 10:46 PM   #8
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Quote:
Originally Posted by Iceni John View Post
When I added a cooler to my HT740 to reduce its heatload into the engine coolant, I had to use a big Thermal Dynamics one because it was the only one with 1" ports.

John
That is a great idea to keep the transmission heat out of the engine coolant and keep the transmission cooler. I did that with my 01 7.3 power stroke. Removed the stock tiny oil to water cooler and bolted in a oil to air cooler from a 6.0. It made a huge difference in transmission temps.

Ted
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Old 07-03-2019, 11:12 AM   #9
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Thanks for the feedback.

It has -8AN fittings so i think the size is good.

It measures 15"x11" with a 10" fan, 650 CFM.

Stay tuned for the results.
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Old 07-03-2019, 11:19 AM   #10
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Originally Posted by Rivetboy View Post
Did this to my 28 foot t/c 2000 1991 5.9 at 545 here is the link do not know how well it works yet as i just got it running . http://www.skoolie.net/forums/f39/tr...a-21810-2.html
Yes i read this thread while researching. Curious about the results for you.
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