KOROP transmission oil cooler 15-Row LPD47391 — low-pressure-drop brazed-aluminum, includes mounting kit

KOROP's 15-row LPD47391 transmission oil cooler kit is a low-pressure-drop aluminum cooler designed to lower transmission temperatures for vehicles up to 40,000 GVW, and it ships with all mounting hardware.

If you tow, haul heavy loads, or operate vans and light trucks in demanding conditions, transmission heat becomes one of the main causes of premature wear. This upgraded 15-row cooler replaces earlier 13-row designs to improve heat rejection while minimizing flow restriction, and it’s built from brazed aluminum for strength and corrosion resistance.

How does this cooler reduce transmission temperatures?

The larger core area and additional rows increase the surface for heat exchange, so hot ATF dissipates faster into passing air. KOROP’s brazed-aluminum construction conducts heat efficiently and resists leaks under pressure, delivering more consistent operating temperatures during towing or stop-and-go driving.

• 15 heat-exchange rows for increased cooling capacity
• Brazed aluminum core for better thermal conduction and durability
• Low-pressure-drop design to maintain flow while cooling
• Improved energy-efficiency ratio compared with smaller cores

Will it fit my vehicle and replace my old cooler?

The LPD47391 is engineered as a direct replacement for common 40K transmission coolers and lists compatibility with many cars, vans, light trucks, RVs, and towing setups. The kit includes brackets and fasteners to adapt to varied mounting points, but always confirm dimensions and inlet/outlet locations against your vehicle before ordering.

• Designed to replace part numbers LPD47391, 47391, OC-4739-1
• Suitable for vehicles with up to 40,000 GVW applications
• Includes universal mounting brackets and high-strength bolts
• Check hose size and port orientation for a proper fit

How straightforward is installation and what hardware is included?

The cooler kit arrives with a full set of mounting components so most installations require only basic hand tools and vehicle-specific hose or adapters. Mounting hardware is sized to allow flexible placement in front of the radiator or A/C condenser, and the included fasteners are corrosion-resistant for long-term reliability.

• Complete mount kit: brackets, bolts, and fasteners
• Bracket designs for radiator or condenser mounting positions
• Corrosion-resistant hardware for outdoor exposure
• Installation generally fits common aftermarket hose fittings

What performance improvements should I expect and is there a warranty?

Upgrading from a 13-row to 15-row core increases cooling efficiency and lowers fluid temperatures under load, which can help transmission components run closer to ideal operating ranges. KOROP backs the cooler with a 12-month warranty and customer support for pre- and post-sale questions.

• Up to 30% more cooling effectiveness vs smaller cores
• Reduced flow restriction—delivers up to 15x less restriction in some setups
• Potential for longer transmission component life due to lower temps
• 12-month limited warranty with customer support access

Who is this for: The KOROP 15-row LPD47391 cooler kit is aimed at owners of towing rigs, commercial vans, light-duty trucks, and RVs who need a robust, low-restriction transmission cooler to manage high heat loads. If you tow frequently, haul heavy cargo, or want a more durable replacement for a worn factory cooler while keeping installation simple with included hardware, this kit is a practical upgrade option.