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Old 07-16-2025, 06:20 PM   #1
Rose Racing
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Default Flush

What is the best method for flushing the cooling system at home? Trans builder said to flush the system after finding debris in my trans.
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Old 07-16-2025, 06:50 PM   #2
Alan Roehrich
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Default Re: Flush

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What is the best method for flushing the cooling system at home? Trans builder said to flush the system after finding debris in my trans.

Most parts stores carry "Cooler Flush", usually, two cans will do the trick to flush a transmission cooler.
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Old 07-16-2025, 10:52 PM   #3
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Default Re: Flush

Kooler Kleen
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Old Yesterday, 08:25 AM   #4
JP1738
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Default Re: Flush

I don't know if this is good or bad, but historically, I've just sprayed a bunch of brake clean through the lines and blown them out with an air hose. Makes a mess but gets the job done.
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Old Yesterday, 12:49 PM   #5
dragracerray
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Default Re: Flush

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What is the best method for flushing the cooling system at home? Trans builder said to flush the system after finding debris in my trans.
J.T.,
Trans guy wants you to flush the transmission fluid cooler in the radiator or wants you to flush the antifreeze? If you have debris in the transmission fluid cooler side of the radiator some times it is best to install a new radiator. Ray
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Old Yesterday, 02:03 PM   #6
Mike Pearson
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Default Re: Flush

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What is the best method for flushing the cooling system at home? Trans builder said to flush the system after finding debris in my trans.
I dont know anyone running a cooler on a race car. I never have.
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Old Yesterday, 03:29 PM   #7
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Default Re: Flush

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Originally Posted by dragracerray View Post
J.T.,
Trans guy wants you to flush the transmission fluid cooler in the radiator or wants you to flush the antifreeze? If you have debris in the transmission fluid cooler side of the radiator some times it is best to install a new radiator. Ray
Radiator cooling lines are just that lines, NO fins.
A plate and fin type cooler should be replaced, tube style can be flushed.
Either one, WAY cheaper than another trans rebuild because of recirculated trash.
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