The Ultimate Tru-Cool MAX 40K transmission oil cooler

The Tru-Cool MAX 40K transmission oil cooler (LPD-4739) is engineered to enhance transmission longevity by effectively reducing oil temperatures. Its innovative stacked plate design positions the transmission oil closest to the surfaces exposed to airflow, significantly improving heat dissipation and cooling efficiency.

This auxiliary cooler is ideal for demanding applications where maintaining optimal transmission temperature is critical. Equipped with 5/8-18 inverted flare ports, it can be easily converted to AN fittings using adapter fittings, ensuring compatibility with Hot Rod AN LLC products for a secure and professional installation.

The Tru-Cool MAX 40K transmission oil cooler LPD4739 offers superior cooling with its durable brazed aluminum construction, delivering twice the performance of the Tru-Cool LPD. Its precise fin spacing optimizes airflow for efficient heat dissipation, making it ideal when an auxiliary transmission oil cooler is required. Installation hardware is included for a straightforward setup, ensuring reliable protection for your transmission under demanding conditions.

How it works

The Tru-Cool MAX 40K transmission oil cooler LPD4739 features an advanced cold weather passive bypass that enhances fluid flow when automatic transmission fluid (ATF) is thick and viscous in low temperatures. As the ATF warms and thins during operation, the system directs it through the cooler core for efficient heat dissipation. This design ensures optimal heat transfer, maintaining ideal fluid viscosity and providing superior protection against lubrication system failure under varying temperature conditions.