81Z28

Have a new 350 trans. Installing a trans cooler. Which line on the trans in the return line?. Top or bottom?.
Thanks

kevinkpk

I don't think it matters

81Z28

According to articles in the past you would want fluid to go thru the extra cooler after it passes thru the radiator so you don't cool it down first
then heat it up as it goes thru the radiator then back to the trans.

kevinkpk

Just bypass the radiator. Shouldn't matter which way the fluid flows. Or put the radiator, external cooler in series. Route the top line from the radiator to the external cooler, then back to the transmission.

kevinkpk

81Z28

Like you said i was going to put them in series. The top line is what i needed without firing her up & seeing which line pukes.

Thanks