TEMSONE transmission oil cooler LPD47391 for 40,000 lb GVW — black brazed-aluminum, low pressure-drop plate core

The TEMSONE LPD47391 is a low-pressure-drop, brazed-aluminum transmission oil cooler built to protect heavy-duty drivetrains on vehicles up to 40,000 lb GVW.

This heavy-duty oil cooler kit combines a compact plate-style core with durable materials and complete mounting hardware to improve transmission temperature control for large trucks, trailers, and towing rigs. The design focuses on efficient heat rejection with minimal flow restriction, helping maintain stable transmission temperatures during extended towing, heavy loads, and high-ambient conditions.

How does the plate-style design improve cooling for large vehicles?

Unlike conventional tube-and-fin cores, the plate-style core provides more surface contact and tighter flow passages for faster heat transfer while occupying less space. That means it can reject more heat in the same or smaller footprint, giving up to about 30% better cooling performance under heavy duty cycles.

• Plate-style brazed aluminum core with high thermal conductivity
• Cooling fins footprint: 8.5" x 22" x 1.25" for concentrated heat exchange
• Smaller overall size than comparable tube-and-fin units
• Improved cooling efficiency for heavy towing and long runs

Will this cooler affect transmission fluid pressure or flow?

The LPD47391 is engineered for low pressure drop so it minimizes added resistance in the transmission circuit, preserving factory fluid flow characteristics. A self-regulating flow profile helps the unit adapt during cold starts and temperature swings without creating excessive backpressure.

• Low pressure-drop core design to reduce hydraulic resistance
• Self-regulating flow behavior during cold and hot conditions
• Maintains OEM-like flow rates for reliable transmission operation

What comes in the kit and how durable is the construction?

The kit includes everything needed for installation: cooler hoses, hose clamps, bolts, nuts, washers, steel mounting straps, screws, and brass fittings — a complete hardware package for a straightforward fitment. The cooler is brazed aluminum for long-term corrosion resistance and structural strength in harsh environments.

• Complete mounting hardware and fittings included for faster install
• Brazed aluminum construction resists corrosion and vibrations
• Black finish for a discreet, professional appearance under the chassis

How much cooling improvement can I expect under heavy loads?

In demanding tow and haul scenarios the plate-style core can deliver significantly better heat rejection than older tube-and-fin designs — generally up to roughly 30% more cooling capacity depending on vehicle, routing, and airflow. That extra margin helps reduce thermal stress on the transmission during sustained high-load operation.

• Up to ~30% improved cooling compared with many tube-and-fin coolers
• Better thermal stability during extended towing or steep grades
• Helps prolong transmission life by reducing operating temperatures

Who is this for: The TEMSONE LPD47391 cooler kit is intended for fleet operators, owner-operators, and technicians who service heavy-duty trucks, trailers, or towing vehicles with a gross vehicle weight rating up to 40,000 lb. It's suited for applications that demand compact, high-efficiency cooling with low hydraulic restriction and a complete hardware package for timely installation. TEMSONE backs the product with one-year quality support and technical assistance for setup or troubleshooting.