Transmission Oil Cooler Hose Assembly for Ford F-150

This is the Dorman 724-021 transmission oil cooler line assembly for the 2012-2014 Ford F-150, the 2012-2014 Ford Lobo and the 2012-2014 Lincoln Mark LT. It comes as a complete assembly with the hard line, the flexible section and the end fittings already built and crimped, so you are not splicing rubber hose into a pressurized cooler circuit.

Cooler lines on these trucks fail at the crimp and at the quick-connect fittings. Salt gets under the line, the steel pits from the outside in, and you end up with a slow red drip behind the front bumper or a puddle after the truck sits. Patch-clamping a pinhole on a line that carries full converter-out pressure is how shops end up doing the job twice.

Plan on losing fluid when you pull it, so have fresh ATF and a drain pan ready. Release the quick-connects with the correct cooler line disconnect tool rather than prying - the plastic collars split easily. Route the new assembly exactly the way the old one sat, keep it clear of the exhaust and the fan, and seat both connectors until they click. Refill, run the truck up to operating temperature, and recheck the fittings and the fluid level with the transmission warm.