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which line for the trans is return

myoldtruck

New Member
Joined
Apr 12, 2019
Messages
3
Im going to install a trans cooler.  which line on the radiator is the return line for the trans fluid.  The top or bottom one?
 
Don't know for sure but if you drive it and then see which one is cooler then you know.
 
The bottom one is always the hot fluid from the transmission, so the top is out or the return that would go to the aux cooler.. This is to keep air from getting trapped in the cooler...
 
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