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Which Line Going to the Radiator of a 2008 Chrysler Town and Country is the Supply Line

Question:

is the upper or lower line going to the radiator the high pressure line

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Expert Reply:

The best way to determine which transmission line is the high-pressure or supply line and which is the return line is to start the motor cold. Place the transmission in drive for 10 seconds and return it to park. Turn off the motor and feel both transmission lines where they exit the radiator. The cooler of the two lines will be your return line, the warmer line is your supply line.

I have included a diagram of a typical transmission cooler installation.

To see a typical install video, click on the provided link.

click to enlarge
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