Leaking transmission lines.

[aochoa]

Hi, I need help with a Transmission Leak, I replaced my Radiator on my 2006 Ford Explorer with an aftermarket Radiator purchased at Napa, the transmission lines going in and out of the radiator started leaking and I returned the radiator to Napa got a new one and its doing it again, leaking Transmission Fluid from the line connector going in the radiator, what can I do?

 

[BrooklynBay]

Welcome to this forum! I've renamed your thread, and moved it into the transmission section. Did you use a sealant on the threads?