---
product_id: 660733634
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 (Silver)"
brand: "lucky seven"
price: "€ 131.02"
currency: EUR
in_stock: true
reviews_count: 8
category: "Lucky Seven"
url: https://www.desertcart.sk/products/660733634-40k-transmission-oil-cooler-lpd47391-heavy-duty-40-000-gvw
store_origin: SK
region: Slovakia
---

# Includes full 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 (Silver)

**Brand:** lucky seven
**Price:** € 131.02
**Availability:** ✅ In Stock

## Summary

> ❄️ Keep your transmission cool, your ride smooth, and your edge sharp.

## 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 (Silver) by lucky seven
- **How much does it cost?** € 131.02 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/660733634-40k-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

- • **Effortless Efficiency:** Advanced low-pressure drop design reduces energy loss, keeping your transmission cooler and your fuel economy optimized.
- • **Heavy-Duty Powerhouse:** Engineered for vehicles up to 40,000 lbs GVW—built to handle your toughest hauls with ease.
- • **Lifetime Peace of Mind:** Backed by a lifetime warranty and dedicated support, ensuring your investment is protected for the long haul.
- • **Plug & Play Installation:** Comes complete with all mounting hardware for a secure, hassle-free setup—get back on the road faster.
- • **Prolonged Transmission Life:** Maintains optimal operating temperatures to extend transmission lifespan and minimize costly repairs.

## Overview

The Lucky Seven 40k Transmission Oil Cooler LPD47391 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 while minimizing heat stress. The kit includes all necessary mounting hardware for easy installation and is backed by a lifetime warranty, making it the ultimate upgrade for professional-grade vehicle performance and reliability.

## Description

Buy 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 (Silver): Engine Oil Coolers & Kits - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

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 |
|---------------|-------|
| Manufacturer | 40k Transmission Oil Cooler |
| Brand | Lucky Seven |
| Model | 40k Transmission Oil Cooler |
| Item Weight | 4 ounces |
| Product Dimensions | 4 x 3 x 3 inches |
| Item model number | LPD47391 40k |
| Exterior | Brushed |
| Manufacturer Part Number | LPD47391 40k |

## 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 (Silver) - Image 1](https://m.media-amazon.com/images/I/81S0F4hZs5L.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.

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.sk/products/660733634-40k-transmission-oil-cooler-lpd47391-heavy-duty-40-000-gvw](https://www.desertcart.sk/products/660733634-40k-transmission-oil-cooler-lpd47391-heavy-duty-40-000-gvw)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-08*