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Old 02-01-2018, 01:22 PM   #11
Bigdav160
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Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
Re: 4l60e cooler line flow

The top of the radiator is the hottest and the bottom the coolest.

In newer car tech, they use hot transmission oil from the converter to warm the radiator up faster to control exhaust emission sooner.

In my truck the hot oil from the transmission goes into the top fitting on the radiator.
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