ZHSYMX 40k Transmission Oil Cooler LPD47391 for 40,000 lb GVW — Low Pressure Drop, Complete Mounting Kit

The ZHSYMX LPD47391 40k is a heavy-duty, low-pressure-drop transmission oil cooler kit designed to protect transmissions on vehicles up to 40,000 lb GVW while including all required mounting hardware.

Built for large commercial trucks, trailers and heavy towing rigs, the ZHSYMX LPD47391 combines efficient thermal management with an installation-ready hardware package so fleets and owners can upgrade cooling capacity quickly. Its low-pressure-drop design reduces stress on the transmission circuit while delivering consistent oil temperature control under sustained loads.

How does the LPD47391 improve transmission cooling on heavy-duty vehicles?

The cooler increases heat exchange area and encourages steady fluid flow so transmission oil runs cooler during long hauls or heavy towing. Cooler fluid helps reduce component wear without adding unnecessary pressure to the circuit.

• Designed for vehicles up to 40,000 lb GVW for commercial applications.
• Low-pressure-drop architecture minimizes system backpressure and pump work.
• Robust fin-and-tube construction for consistent heat transfer under load.

What comes in the kit and how does it simplify installation?

The LPD47391 kit ships with a full set of mounting hardware so you can mount the cooler to varied chassis layouts without sourcing separate fasteners. Brackets, bolts and clips match typical heavy-duty installation points for a straightforward retrofit.

• Complete mounting kit: brackets, bolts, fasteners and fittings included.
• Hardware chosen to fit common heavy-duty truck and trailer configurations.
• Installation-friendly layout reduces labor time for professional shops or experienced DIYers.

Will the low-pressure-drop feature affect transmission performance?

No — the low-pressure-drop design is intended to maintain oil circulation efficiency while lowering pressure loss across the cooler. That means the transmission pump sees less added resistance, supporting reliable hydraulic function even when cooling demands are high.

• Minimizes pressure loss to preserve pump efficiency and response.
• Reduces additional load on transmission hydraulic systems during operation.
• Helps maintain intended shift and coupling behavior by avoiding excess backpressure.

What warranty and support can I expect after purchase?

ZHSYMX provides ongoing warranty support and a responsive after-sales team to handle questions or issues after installation. The manufacturer commits to lifetime warranty service for the transmission oil cooler, backed by customer support to help resolve fitment or performance inquiries.

• Lifelong warranty service for peace of mind over the product lifespan.
• Dedicated after-sales support to answer installation and compatibility questions.
• Documentation and parts guidance available if hardware replacement is needed.

Who this is for: Fleet managers, professional mechanics and owner-operators who run medium- to heavy-duty trucks or trailers and need dependable transmission temperature control will benefit most from the ZHSYMX LPD47391. If your vehicle operates near the 40,000 lb GVW range or regularly tows heavy loads where transmission temperatures rise, this kit offers a practical, install-ready upgrade to improve cooling efficiency and protect drivetrain components.