19-Row Transmission Cooler Kit with AN-10 Fittings and Fan

Nineteen-row stacked-plate transmission cooler kit built around a T-6061 aluminum core with AN-10 (7/8-14 UNF) inlet and outlet ports. The kit ships with the cooler, a 5.5 inch 12V 30W puller fan rated at 315 CFM, and the mounting bracket hardware, so it goes in as a complete auxiliary cooling circuit rather than a bare core you have to build a bracket for. Core is powder coated and anodized black. Assembled weight is 6.4 lb and the boxed kit measures 14.6 x 11.4 x 6.3 inches.

This is the cooler you add when the factory in-radiator cooler can no longer keep up: towing, a 4x4 that spends time in low range, a converter that slips under load, or any build where you have watched the pan temperature climb past 200 F and stay there. ATF starts oxidizing hard above roughly 220 F, and every 20 degrees over that cuts fluid life roughly in half, which is what takes out clutches and glazes bands on an otherwise healthy unit. A stacked-plate core like this one moves considerably more heat per row than a tube-and-fin cooler of the same face area because the fluid is routed through flat plates instead of a single serpentine tube.

Plumbing is AN-10, so it suits a build that is already running braided line and AN fittings, or a stock cooler line conversion using -10 hose ends. Standard practice is to mount it in front of the condenser with clean airflow through the core, run the return line from the transmission out to the cooler and back to the cooler line fitting on the case, and wire the fan to a thermostatic switch or a relay off a temperature sender so it only pulls current when the fluid is actually hot. Fill the core with ATF and purge the air before you drop the vehicle off the lift, and check every fitting under pressure after the first heat cycle. No line, fittings or thermostatic switch are included with the kit.