What line on the radiator is the return line to the trans?

I want to put a cooler inline but I want to hook up to the line going back to the trans.

On crossflow side tank radiators the transmission return line is ALWAYS the top line and on downflow radiators with top and bottom tanks the transmission return line will USUALLY be the passenger side line. But to verify that, find the highest line on the transmission and follow it to the radiator. That will be the return line from the radiator to the transmission.

This entry was posted on Tuesday, October 20th, 2009 at 6:57 pm and is filed under trans. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

3 Responses to “What line on the radiator is the return line to the trans?”

Stephen on October 21st, 2009 at 12:31 am

Unless you have a trans cooler installed (looks like smaller radiator and is it’s on closed system) there is no out to the trans or radiator style cooling. The coolant from the radiator is strictly engine only.
References :
mdmechenstien on October 21st, 2009 at 12:40 am

it wont matter, your still removing the same amount of heat. but just remove one line and start it real quick
References :
Kenny D on October 21st, 2009 at 12:47 am

On crossflow side tank radiators the transmission return line is ALWAYS the top line and on downflow radiators with top and bottom tanks the transmission return line will USUALLY be the passenger side line. But to verify that, find the highest line on the transmission and follow it to the radiator. That will be the return line from the radiator to the transmission.
References :

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