KOROP Transmission Oil Cooler Kit LPD47391 40k GVW Heavy-Duty Brazed-Aluminum, Low-Pressure-Drop

This heavy-duty transmission cooler combines a compact brazed-aluminum core with low-pressure-drop engineering to increase heat transfer without restricting fluid flow. The LPD47391 is built for demanding towing and commercial applications and arrives as a full kit with brackets, bolts, and fasteners for straightforward installation. It is a direct-fit replacement for several OE numbers and includes a 12-month limited warranty for added confidence.

How does this cooler lower transmission temperatures effectively?

The brazed-aluminum construction and optimized fin/core geometry maximize surface area to move heat out of the transmission fluid efficiently. Low-pressure-drop design preserves fluid flow so the transmission pump doesn’t work harder to circulate fluid while still improving cooling performance.

• Durable brazed-aluminum core for improved thermal conductivity
• Low-pressure-drop channels retain pump efficiency
• Up to 30% increased cooling capacity compared to standard cores
• Compact footprint for tight engine bay fitment

What vehicles and applications is the LPD47391 compatible with?

The LPD47391 is intended for cars, vans, light trucks, RVs and many towing setups where a heavy-duty 40,000 GVW-rated cooler is required. It replaces common OE references including LPD47391, 47391, and OC-4739-1, making it suitable as an upgrade or direct replacement in many systems.

• Rated for heavy-duty towing and commercial use up to 40,000 lbs GVW
• Matches several OE part numbers for straightforward replacement
• Works with a variety of vehicle types: trucks, vans, RVs, and passenger cars
• Designed for both new installations and retrofit upgrades

What’s included in the kit and how easy is installation?

This transmission cooler kit ships as a comprehensive package with all the mounting hardware and fasteners needed to secure the unit. Installers will find brackets, bolts, and clips that are intended to adapt to different mounting points, simplifying the process for professional mechanics and experienced DIYers alike.

• Complete mounting hardware set: brackets, bolts, and fasteners
• Pre-configured fittings compatible with standard transmission lines
• Compact design eases fitting in crowded engine bays
• Installation typically requires basic hand tools and standard workshop practices

What warranty and support come with the KOROP cooler?

The LPD47391 includes a 12-month warranty covering manufacturing defects under normal use. KOROP customer service is available for pre-sale fitment questions and post-sale technical support to help ensure the cooler performs as intended.

• 12-month limited warranty included
• Customer support for fitment and installation questions
• Access to replacement mounting hardware if required

Who is this for: The KOROP LPD47391 cooler is aimed at vehicle owners and fleet managers who tow regularly, operate light- to medium-duty trucks, drive RVs, or run commercial vehicles where transmission heat control matters. It’s also a good choice for mechanics and technicians seeking a rugged, high-capacity replacement cooler with low pressure drop characteristics and a full mounting kit for faster installs.