---
product_id: 738983167
title: "40k Transmission Oil Cooler LPD47391, Heavy Duty 40,000 GVW Max, Low Pressure Drop, Compatible with Tru-Cool,Includes Mounting Hardware-Ideal for Heavy Vehicles,40,000 GVW transmission cooler (black)"
brand: "lucky seven"
price: "€ 200.80"
currency: EUR
in_stock: true
reviews_count: 8
category: "Lucky Seven"
url: https://www.desertcart.gr/products/738983167-40k-transmission-oil-cooler-lpd47391-heavy-duty-40-000-gvw
store_origin: GR
region: Greece
---

# Complete mounting kit 40,000 lbs GVW max Low pressure drop tech 40k Transmission Oil Cooler LPD47391, Heavy Duty 40,000 GVW Max, Low Pressure Drop, Compatible with Tru-Cool,Includes Mounting Hardware-Ideal for Heavy Vehicles,40,000 GVW transmission cooler (black)

**Brand:** lucky seven
**Price:** € 200.80
**Availability:** ✅ In Stock

## Summary

> ❄️ Keep your transmission chill, even when the haul heats up!

## Quick Answers

- **What is this?** 40k Transmission Oil Cooler LPD47391, Heavy Duty 40,000 GVW Max, Low Pressure Drop, Compatible with Tru-Cool,Includes Mounting Hardware-Ideal for Heavy Vehicles,40,000 GVW transmission cooler (black) by lucky seven
- **How much does it cost?** € 200.80 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/738983167-40k-transmission-oil-cooler-lpd47391-heavy-duty-40-000-gvw)

## Best For

- lucky seven enthusiasts

## Why This Product

- Trusted lucky seven brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Lifetime Peace of Mind:** Backed by a lifetime warranty and dedicated support—because your rig deserves reliable protection.
- • **Extend Transmission Life:** Optimized cooling technology prevents overheating, reducing wear and costly repairs over time.
- • **Heavy-Duty Cooling Power:** Engineered for vehicles up to 40,000 lbs GVW—built to handle your toughest hauls.
- • **Plug & Play Installation:** Includes all premium mounting hardware for a hassle-free, secure fit—get back on the road faster.
- • **Efficiency Meets Performance:** Advanced low-pressure drop design reduces energy loss and keeps your transmission running cooler and smoother.

## Overview

The LPD47391 40k Transmission Oil Cooler Kit is a heavy-duty cooling solution designed for vehicles up to 40,000 lbs GVW. Featuring advanced low-pressure drop technology, it maximizes transmission efficiency by minimizing energy loss and heat buildup. The kit includes all necessary mounting hardware for easy installation and is engineered to extend transmission life by maintaining optimal operating temperatures. Backed by a lifetime warranty and dedicated customer support, this cooler is ideal for commercial trucks, trailers, and towing vehicles seeking reliable, long-lasting performance.

## Description

Efficient Cooling for Heavy-Duty VehiclesThe LPD47391 40k Transmission Oil Cooler Kit is engineered to deliver superior cooling performance for vehicles with a maximum gross vehicle weight (GVW) of 40,000 pounds. Whether you're driving a large commercial truck, towing a trailer, or operating a heavy-duty SUV, this transmission cooler is designed to help maintain optimal performance by keeping transmission temperatures in check. Ideal for towing and long-distance travel, the cooler enhances vehicle efficiency and reliability, especially during high-stress operations.Low Pressure Drop Design for Maximum EfficiencyOne of the standout features of this transmission cooler is its advanced low-pressure drop technology. By minimizing pressure loss as the oil flows through the cooler, it reduces energy consumption while maintaining optimal transmission function. This helps protect your vehicle’s critical components from overheating, ensuring smoother gear shifts and prolonged transmission life. The low-pressure design also helps save fuel, making this cooler a valuable upgrade for those looking to increase their vehicle’s efficiency.Complete Mounting Kit IncludedInstallation is made easy with the included mounting hardware. The LPD47391 kit comes with high-quality bolts, fasteners, and brackets that are designed to fit a wide range of heavy-duty vehicles. Whether you are a professional mechanic or a DIY enthusiast, the straightforward installation process ensures a stable, secure fit. This means you can quickly install the cooler and get back on the road with confidence.Advanced Cooling Technology for Long-Term ProtectionWith advanced cooling technology, this transmission oil cooler not only maintains a steady operating temperature but also significantly extends the life of your transmission. By efficiently dissipating heat, the cooler helps prevent potential damage caused by overheating, reduces the likelihood of maintenance issues, and ensures your vehicle performs at its best. Whether you’re towing heavy loads, driving through rough terrain, or dealing with hot climates, this cooler keeps your vehicle running smoothly.Lifetime Warranty for Peace of MindWhen you invest in the LPD47391 Transmission Oil Cooler Kit, you’re backed by a lifetime warranty. Our dedicated customer service team is always available to assist with any questions or concerns, ensuring a hassle-free experience. This product is built to last, offering you reliable performance and the peace of mind that comes with knowing your vehicle is protected.Key Features:Compatible with heavy-duty vehicles (up to 40,000 lbs GVW)Advanced low-pressure drop technologyComplete installation kit with high-quality mounting hardwareImproves transmission efficiency and extends component lifeLifetime warranty and dedicated customer supportPerfect for:Towing applicationsCommercial trucks and trailersPerformance SUVs and trucksLight trucks and RVsWhether you’re looking for enhanced transmission cooling for everyday driving or need a reliable solution for long hauls and towing, the LPD47391 40k Transmission Oil Cooler Kit provides unmatched performance, longevity, and peace of mind. Upgrade your vehicle’s cooling system today and ensure your transmission stays protected in even the most demanding conditions.

Review: Good price lasting quality - Had this trans cooler on my truck for at least 6 months now and it has not given my a sing issue. The install was simple. I installed this on my 99 Silverado for my built 4l60e and have seen my trans temps stay low even after doing hard pulls. Amazing price and quality
Review: Well worth the money!! - It was really hot. We were stuck in a tunnel in Boston. Boston is hell at rush hour. We knew this...we went anyway. We were hauling a big trailer with a 1985 Chevy pick up. It's old. We're old too. We knew it was a lot to ask of this truck, so installed this transmission cooler. The truck didn't over heat! We didn't have to run the heater on a 90 degree day in the tunnel! It still was a horrible trip, but at least made less horrible by a GREAT transmission cooler! On the way home to Maine we avoided Boston, we swung by the White Mountains, and again, the cooler worked great, hauling up those big hills in the White Mountains it performed flawlessly! We would highly recommend!!

## Features

- [Application and Compatibility] The LPD47391 40k Transmission Oil Cooler Kit is engineered for heavy-duty vehicles, with a maximum GVW of 40,000 lbs. Transmission cooler,Perfect for large trucks, trailers, and towing vehicles, it ensures your vehicle runs cooler and more efficiently.
- [Low Pressure Drop Design] LPD47391 40k Transmission Oil Cooler Kit,With advanced low-pressure drop technology, the cooler minimizes energy consumption and system pressure loss, maximizing transmission efficiency while protecting critical components from excessive heat.
- [Includes Mounting Hardware] The LPD47391 40k Transmission Oil Cooler Kit includes all essential mounting hardware – bolts, fasteners, and brackets – designed for various vehicle types. With simple installation, you’ll have a secure, stable fit for long-term reliability.
- [Advanced Cooling Protection] LPD47391 40k Transmission Oil Cooler Kit,Designed for advanced cooling protection, this kit maintains optimal transmission temperature, prolonging its lifespan, enhancing fuel efficiency, and reducing the risk of costly repairs.
- [After-Sales Support] Backed by a lifetime warranty, the LPD47391 cooler offers peace of mind. Our dedicated support team is available anytime to assist with any issues, ensuring your satisfaction.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0F17LK6FG |
| Best Sellers Rank | #16,338 in Automotive ( See Top 100 in Automotive ) #7 in Towing Hitch Engine Oil Coolers & Kits |
| Brand | Lucky Seven |
| Customer Reviews | 4.0 4.0 out of 5 stars (132) |
| Date First Available | September 13, 2024 |
| Exterior | Brushed |
| Item Weight | 4 ounces |
| Item model number | LPD47391 40k |
| Manufacturer | 40k Transmission Oil Cooler |
| Manufacturer Part Number | LPD47391 40k |
| Model | 40k Transmission Oil Cooler |
| Package Dimensions | 25.47 x 13.3 x 3.62 inches |

## Images

![40k Transmission Oil Cooler LPD47391, Heavy Duty 40,000 GVW Max, Low Pressure Drop, Compatible with Tru-Cool,Includes Mounting Hardware-Ideal for Heavy Vehicles,40,000 GVW transmission cooler (black) - Image 1](https://m.media-amazon.com/images/I/81-OfFY7ocL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good price lasting quality
*by B***N on January 11, 2026*

Had this trans cooler on my truck for at least 6 months now and it has not given my a sing issue. The install was simple. I installed this on my 99 Silverado for my built 4l60e and have seen my trans temps stay low even after doing hard pulls. Amazing price and quality

### ⭐⭐⭐⭐⭐ Well worth the money!!
*by L***. on October 23, 2025*

It was really hot. We were stuck in a tunnel in Boston. Boston is hell at rush hour. We knew this...we went anyway. We were hauling a big trailer with a 1985 Chevy pick up. It's old. We're old too. We knew it was a lot to ask of this truck, so installed this transmission cooler. The truck didn't over heat! We didn't have to run the heater on a 90 degree day in the tunnel! It still was a horrible trip, but at least made less horrible by a GREAT transmission cooler! On the way home to Maine we avoided Boston, we swung by the White Mountains, and again, the cooler worked great, hauling up those big hills in the White Mountains it performed flawlessly! We would highly recommend!!

### ⭐ Never got back to me about a warranty claim.
*by C***E on January 13, 2026*

The Cooler developed a leak about 8 months after i purchased it, or about 15,000 miles. The leak isn't necessarily the reason why i'm writing this review, i'm writing this review because I messaged the seller trying to claim the warranty, and I did not hear back from the seller. I purchased this specific cooler for the lifetime warranty and it seems like I won't be claiming that anytime soon. Also, this is NOT from the tru cool brand, I already knew that when I purchased it however to those of you who are confused, it's not from tru cool.

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-02-26*