LPD47391 For Tru Cool 40K Transmission Cooler Trans Oil Cooler GVW Max 40,000

Transmission Cooler LPD47391 for Tru Cool 40K

This LPD47391 transmission cooler is a heavy-duty stacked-plate oil cooler engineered to replace the Tru Cool 40K model, maintaining safe transmission fluid temperatures in vehicles with a gross vehicle weight (GVW) rating up to 40,000 lbs.

Overview

The LPD47391 transmission cooler for Tru Cool 40K applications is built to handle extreme heat generated during towing, hauling, and sustained high-load driving. Its stacked-plate construction offers superior cooling efficiency compared to tube-and-fin designs, making it a popular upgrade for trucks, RVs, and commercial vehicles. Whether you’re climbing grades with a trailer or navigating stop-and-go traffic, the LPD47391 cooler helps protect your transmission from overheating and fluid breakdown.

Built For Performance

• Stacked-plate core design maximizes heat transfer surface area
• Rated for gross vehicle weight up to 40,000 lbs
• Direct-fit replacement mounts in the same location as the Tru Cool 40K
• Durable aluminum construction withstands road vibration and corrosion
• Low internal restriction maintains consistent fluid pressure
• Large inlet and outlet ports support high-volume fluid flow

On-The-Job Use

• Long-haul towing with trailers, fifth-wheels, and goosenecks
• Motorhome and RV transmission cooling on steep mountain passes
• Stop-and-go delivery routes in hot summer temperatures
• Performance driving and track days where transmission temps climb rapidly
• Commercial fleet operations that demand reliable daily transmission cooling

Specs At A Glance

Good To Know

Q: Is the LPD47391 a direct replacement for the Tru Cool 40K cooler? A: Yes, it shares the same dimensions and hose fittings as the Tru Cool 40K, enabling straightforward bolt-in installation on most vehicles that originally used that model.

Q: Do I need to add a thermostat with this transmission cooler? A: A thermostat is not required but can be beneficial in cold climates to prevent over-cooling and allow the transmission to reach normal operating temperature faster.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.