Koyo Aluminum External Automatic Transmission Oil Cooler

The Koyo Koyorad aluminum external automatic transmission oil cooler line gives your automatic transmission extra cooling capacity. It is also sold as an auxiliary ATF cooler or transmission fluid cooler. Each cooler works as a heat exchanger that lowers automatic transmission fluid (ATF) temperatures. This helps protect internal transmission components from heat-related wear during towing, hauling, hot-weather driving and performance use.

Key Features:

• Aluminum construction for lightweight, corrosion-resistant durability and efficient heat dissipation
• External design that supplements the factory transmission cooling system and mounts in a high-airflow location
• Helps reduce fluid oxidation and breakdown, which supports longer fluid and transmission life
• Engineered flow passages for efficient heat exchange
• OE-equivalent quality from Koyorad, a cooling-system manufacturer with decades of experience in radiators, oil coolers and intercoolers

Koyo builds its cooling products with premium OE-grade materials. Its manufacturing facilities hold ISO 9001 certification. These coolers suit daily drivers, work trucks and tow vehicles, as well as performance builds that need more thermal capacity. Choose the specific part number for your application from the options on this page.