LPD47391 Low Pressure Drop 40k Transmission Oil Cooler - Durable

In this review the LPD47391 low pressure drop 40k transmission oil cooler is examined for drivers who tow or operate heavy duty vans, light trucks and RVs and need reliable transmission temperature control. The bottom line: this cooler is for owners who want a compact, durable brazed aluminum core that lowers transmission temps under load. Our review found it performs well at holding temperatures down and is straightforward to install for someone with experience, though buyers should confirm the 40k kit model before ordering and consider professional installation if unsure.

Key Features

• Low pressure drop design: Helps maintain transmission fluid flow while providing effective heat rejection for towing and heavy use.
• Compact size: The cooler measures 8.5in x 22.75in x 1.3in, fitting tight front-end locations where space is limited.
• Brazed aluminum construction: Durable materials resist corrosion and high temperatures for a longer service life in harsh conditions.
• Compatibility for 40k applications: Built to suit 40,000 GVW max trans cooler kits, making it suitable for cars, vans, light trucks and RV towing setups.
• Mounting hardware included: Ships with the pieces needed to attach the cooler so installers have what they need for a clean fitment.
• Customer support: The seller promises to reply within 12 hours for service questions, giving buyers a direct help channel.

Who It's For

This cooler is aimed at owners of trucks, vans, SUVs and RVs that tow or carry heavy loads and require extra transmission cooling beyond the factory unit. It suits DIY mechanics who have installed transmission cooling lines before and professional installers who need a compact, robust cooler for tight installs.

Those who should look elsewhere are drivers who need an integrated hoses-and-lines kit with long-life reinforced hoses out of the box, or owners who cannot confirm their 40k kit model; several buyers reported short hose lifespan and occasional leakage, so users who want a fully proven hose solution may prefer a different complete kit.

Pros & Cons

Pros

• Effective cooling performance that keeps transmission temperatures noticeably lower under load.
• Sturdy brazed aluminum build offers corrosion and heat resistance for longevity.
• Compact footprint fits restricted mounting locations and comes with mounting hardware.
• Easy to install for those with experience, reducing labor time.

Cons

• Reported issues with hose lifespan and occasional leakage mean buyers should inspect included hoses or plan to use upgraded lines.
• Must confirm compatibility with the exact 40k kit model before ordering to avoid fitment problems.

Specifications

Model	LPD47391 low pressure drop
Application	40k transmission cooler for cars, vans, light trucks, RVs and towing
Dimensions	8.5in x 22.75in x 1.3in
Core material	Brazed aluminum
Mounting	Includes mounting hardware
Temperature resistance	High temperature resistant construction
Support	Response within 12 hours for service questions

Our Verdict

The LPD47391 is a solid choice for owners who need a compact, durable transmission cooler for 40k towing applications; it provides clear cooling benefits and a sturdy brazed aluminum build at a reasonable value. Confirm your 40k kit model and consider upgrading hoses if longevity is critical, but for reducing transmission temps under load it is a practical, worth-considering option.

Frequently Asked Questions

Will this fit my 40k transmission cooler kit?
Confirm the 40k kit model before purchasing; the cooler is designed for LPD47391 40k applications and fitment varies by vehicle and kit.

Are hoses included and are they durable?
Mounting hardware is included, but some customers have reported short hose lifespan and occasional cracking, so inspect hoses after install and consider upgraded lines if needed.

Is professional installation required?
Professional installation is recommended for first-time installers, though experienced DIYers can install it using the provided mounting hardware.