20k Transmission Cooler

The DERALE 20k Transmission Cooler (model DER13104) is an essential upgrade for any vehicle owner serious about transmission longevity and performance. Whether you're towing heavy loads, driving in high-heat climates, or pushing your engine in spirited driving conditions, transmission fluid temperatures climb rapidly without proper cooling management. This cooler addresses that critical need by maintaining optimal fluid temperatures, preventing the thermal breakdown that degrades shift quality, reduces friction modifier effectiveness, and accelerates wear on internal clutch packs and seals.

DERALE's 20k cooler employs a compact aluminum tube-and-fin core design that maximizes heat dissipation while fitting tight underbody spaces common in modern platforms. The 20,000 BTU/hour capacity handles substantial thermal loads without imposing excessive backpressure on transmission circuits—a critical balance that protects internal seals and bearing surfaces. The unit measures 13.15 x 2.3 x 18.9 inches and weighs just 3.95 pounds, making it a bolt-in solution for most aftermarket and OEM mounting brackets. Its efficient single-pass flow path keeps pressure drop minimal while promoting consistent cooling across the entire core surface, ensuring every gallon of fluid receives equal temperature reduction.

Mechanics and enthusiasts install the DERALE 20k cooler on performance builds, heavy-duty truck conversions, and any platform experiencing sustained transmission temperatures above 180°F. It pairs seamlessly with stock or upgraded transmission lines and integrates directly into existing cooling circuits via standard -6 AN fittings. Vehicle owners who regularly tow trailers, drive in desert heat, or run aggressive shift tuning benefit most from this cooler's capacity to reduce fluid viscosity loss and extend transmission service intervals significantly. Proper installation requires quality hose routing away from engine heat sources and verification of line pressure to ensure the cooler's design parameters remain within specification.