KOROP 15-Row Transmission Oil Cooler Kit LPD47391 — 40,000 GVW, Low-Pressure-Drop, Brazed Aluminum with Mounting Hardware

KOROP's 15-row LPD47391 transmission oil cooler kit is a low-pressure-drop, brazed-aluminum cooler engineered to reduce transmission temperatures for vehicles up to 40,000 GVW while including all mounting hardware for a straightforward install.

This improved LPD47391 cooler replaces earlier 13-row designs with a 15-row core to boost heat transfer, lower flow restriction and support heavier towing and hauling demands. Built from durable brazed aluminum, the cooler prioritizes efficient cooling and long-term reliability for cars, vans, light trucks, RVs and other 40,000 GVW maximum applications. The kit includes brackets, bolts and fasteners tailored to common installation configurations and is backed by a 12-month warranty for added confidence.

How does the 15-row design improve cooling compared to the previous model?

The additional rows increase the surface area available for heat exchange so transmission fluid sheds heat faster. That leads to lower operating temperatures under load and helps the transmission run more efficiently over long drives or during towing.

• 15-row brazed-aluminum core for increased heat transfer vs 13-row models
• Up to 30% more cooling capacity under similar conditions
• Design yields faster cooling speed and more stable temperature control

Will this cooler work with my vehicle and towing setup?

The LPD47391 is designed for heavy-duty use within the 40,000 GVW class and is compatible with cars, vans, light trucks and many RVs used for towing. It replaces common OE numbers including 47391 and OC-4739-1, but always verify fit and hose sizing against your vehicle's specifications before purchase.

• Fits advanced cooling needs for vehicles and towing applications up to 40,000 GVW
• Compatible replacement for part numbers 47391 and OC-4739-1
• Includes mounting hardware to accommodate a variety of installation orientations

How difficult is installation and what hardware is included?

The cooler kit ships with a complete mounting hardware set to simplify installation and reduce downtime. Hardware includes purpose-fit brackets, bolts and fasteners designed to match common vehicle mounting points, though some installations may require vehicle-specific brackets or minor modifications.

• Full mounting kit: brackets, bolts, fasteners for secure mounting
• Universal-friendly components to fit multiple vehicle layouts and orientations
• Professional or experienced DIY installation recommended for leak-free connections

What durability and warranty features does this KOROP cooler provide?

The cooler uses brazed-aluminum construction to resist vibration and thermal cycling while minimizing flow restriction. KOROP offers a 12-month warranty and customer support to address pre- and post-sale questions, helping ensure reliable performance over regular service intervals.

• Brazed aluminum construction for strength and corrosion resistance
• Low-pressure-drop design—up to 15x less flow restriction than some designs
• 12-month warranty and customer support included

Who is this for: The KOROP 15-row LPD47391 cooler is intended for owners and operators of cars, vans, light trucks and RVs that tow or haul near the 40,000 GVW range and need a durable, higher-capacity transmission cooling solution. It's a good fit for fleet vehicles, towing enthusiasts and anyone replacing a worn or undersized OE cooler who wants improved heat rejection, lower flow restriction and a comprehensive mounting kit for a cleaner installation.