---
product_id: 542840977
title: "Low Pressure Drop Transmission Oil Cooler LPD47391 4739 40,000 GVW with Mounting Hardware (Black)"
brand: "gagsu"
price: "5615688₫"
currency: VND
in_stock: true
reviews_count: 8
category: "Gagsu"
url: https://www.desertcart.vn/products/542840977-low-pressure-drop-transmission-oil-cooler-lpd47391-4739-40-000
store_origin: VN
region: Vietnam
---

# Complete mounting hardware included 40,000 lbs GVW capacity Low pressure drop tech for max cooling Low Pressure Drop Transmission Oil Cooler LPD47391 4739 40,000 GVW with Mounting Hardware (Black)

**Brand:** gagsu
**Price:** 5615688₫
**Availability:** ✅ In Stock

## Summary

> ❄️ Keep your transmission cool, your ride unstoppable.

## Quick Answers

- **What is this?** Low Pressure Drop Transmission Oil Cooler LPD47391 4739 40,000 GVW with Mounting Hardware (Black) by gagsu
- **How much does it cost?** 5615688₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/542840977-low-pressure-drop-transmission-oil-cooler-lpd47391-4739-40-000)

## Best For

- gagsu enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Efficiency:** Advanced low-pressure drop design minimizes energy loss while maximizing transmission cooling performance.
- • **Heavy-Duty Cooling Power:** Engineered for vehicles up to 40,000 lbs GVW—tackle your toughest hauls without overheating.
- • **Plug & Play Installation:** Comes with all mounting hardware for a seamless, hassle-free setup—get back on the road faster.
- • **Extended Transmission Life:** Superior heat dissipation keeps your transmission in the optimal temperature zone, reducing wear and costly repairs.
- • **Worry-Free Warranty & Support:** Lifetime warranty backed by a dedicated after-sales team ensures your investment is protected.

## Overview

The Gagsu LPD47391 Transmission Oil Cooler is a robust, low-pressure drop cooling solution designed for heavy-duty vehicles up to 40,000 lbs GVW. Featuring advanced cooling technology and complete mounting hardware, it ensures efficient heat dissipation, prolongs transmission life, and simplifies installation. Backed by a lifetime warranty and expert support, it’s the ultimate upgrade for professionals demanding reliability and performance on every haul.

## Description

Buy Gagsu Low Pressure Drop Transmission Oil Cooler LPD47391 4739 40,000 GVW with Mounting Hardware (Black): Engine Oil Coolers & Kits - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Great upgrade for your truck - I replaced the small factory tow package cooler since my temps were near 200 degrees and would go over 200 degrees pulling my boat. I flipped the bottom bracket around and used a grinder to notch it so I could mount the trans cooler to it (had to slide the cooler to the passenger side a bit to clear the mount for the PS cooler). I used a brake line cutter to cut the factory lines off horizontal, and then used a brake flare tool to slightly flare them. I doubled up on the clamps where the hose connected to the factory lines. On the cooler, I used pipe thread tape around the fittings to ensure no leaks. Pros: seems to be working good. Put about 50 miles on the truck last night on the highway going 80 MPH with the AC running. Temps never got above the halfway mark from 100 to 200 (so I'm guessing that's 150 or 160 degrees). Install took me about 2 hours in my driveway. I used everything included in the kit (had to cut the hose to fit). Cons: fins are really easy to bend. I had to use a small flat blade screwdriver to straighten some of them out after I was done mounting the cooler. Also, the included clamps are cheap. I've got a tiny drip from the return hose where it clamps to the cooler fitting. I'm going to replace that clamp with a clamp from the auto parts store tonight. My advice would be just get 2 packs of small hose clamps from your local auto parts store and use those instead of the included ones. Also that included screws will strip easily at the phillips head. I used a 10mm socket to tighten them. I snapped one off but I guess I didn't drill a large enough pilot hole for it to mount to the bracket on my 2000 Chevy Silverado Z71. I also flushed the transmission while I had the stock cooler off. I used some clear 3/8" hose and ran it into a bucket. I started the truck and while the dark old fluid was coming out I was pouring in new fluid until it was coming out red. Then I installed the cooler, added more fluid, started the truck, and kept adding fluid until it was at the proper level. I think I flushed about 3 gallons (12 quarts) through it to get the dark fluid out. I ended up buying 5 gallons of fluid total (in gallon jugs from Walmart) and I have about a half jug left after the trans was full. If you don't need to flush yours out you won't need as much fluid.
Review: would definitely purchase again! - Bought a camper which we started towing with my 2004 Nissan Armada. However, when we started towing, we noticed the transmission getting hot. After researching, I realized that the factory transmission cooler is not big enough, especially for towing, so I looked into an exterior trans cooler. This one had excellent ratings, so I gave it a shot, and it has been amazing. I disconnected the stock transmission cooler, which is in the radiator and installed this external unit in its place. I am so happy I did. Our trans temp has not been elevated since we put this cooler in. It is well built and appears ready to last for the long haul. Could not be happier.

## Features

- [Application and Compatibility] - The LPD47391 40k Transmission Oil Cooler Kit is specifically designed for heavy-duty vehicles. It is capable of handling a maximum gross vehicle weight (GVW) of 40,000 pounds, making it suitable for various types of large commercial trucks, trailers, and towing vehicles.
- [Low Pressure Drop Design] - This cooling kit incorporates advanced low-pressure drop technology, ensuring minimal pressure loss as the transmission oil flows through the cooler. This effectively reduces energy consumption and system pressure, while enhancing the cooling efficiency of the transmission.
- [Includes Mounting Hardware] - The cooler kit comes with a complete set of mounting hardware, including high-quality bolts, fasteners, and brackets. These components are designed to seamlessly match different vehicle types and installation configurations, simplifying the installation process while ensuring reliable and stable mounting.
- [Advanced Cooling Protection] - This cooler kit utilizes advanced cooling technology to maintain the transmission within the proper operating temperature range. Through efficient heat dissipation and effective heat exchange, it prolongs the lifespan of the transmission, reduces the risk of maintenance and failures, and enhances the overall reliability and fuel efficiency of the vehicle.
- [WARRANTY AND AFTER-SALES] - Transmission Oil Cooler provides lifelong warranty service, we have a strong after-sales team, after the purchase of products you have any questions can contact us at any time, to ensure your shopping worry free.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B41WCB7R |
| Best Sellers Rank | #12,646 in Automotive ( See Top 100 in Automotive ) #7 in Towing Hitch Engine Oil Coolers & Kits |
| Brand | Gagsu |
| Customer Reviews | 4.2 4.2 out of 5 stars (708) |
| Date First Available | June 14, 2022 |
| Exterior | Metal |
| Item Weight | 5.79 pounds |
| Item model number | LPD47391 |
| Manufacturer | Gagsu |
| Manufacturer Part Number | LPD47391 |
| Model | LPD47391 |
| Package Dimensions | 25.25 x 10.13 x 2.88 inches |

## Images

![Low Pressure Drop Transmission Oil Cooler LPD47391 4739 40,000 GVW with Mounting Hardware (Black) - Image 1](https://m.media-amazon.com/images/I/71JflbinjjL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great upgrade for your truck
*by L***7 on June 8, 2023*

I replaced the small factory tow package cooler since my temps were near 200 degrees and would go over 200 degrees pulling my boat. I flipped the bottom bracket around and used a grinder to notch it so I could mount the trans cooler to it (had to slide the cooler to the passenger side a bit to clear the mount for the PS cooler). I used a brake line cutter to cut the factory lines off horizontal, and then used a brake flare tool to slightly flare them. I doubled up on the clamps where the hose connected to the factory lines. On the cooler, I used pipe thread tape around the fittings to ensure no leaks. Pros: seems to be working good. Put about 50 miles on the truck last night on the highway going 80 MPH with the AC running. Temps never got above the halfway mark from 100 to 200 (so I'm guessing that's 150 or 160 degrees). Install took me about 2 hours in my driveway. I used everything included in the kit (had to cut the hose to fit). Cons: fins are really easy to bend. I had to use a small flat blade screwdriver to straighten some of them out after I was done mounting the cooler. Also, the included clamps are cheap. I've got a tiny drip from the return hose where it clamps to the cooler fitting. I'm going to replace that clamp with a clamp from the auto parts store tonight. My advice would be just get 2 packs of small hose clamps from your local auto parts store and use those instead of the included ones. Also that included screws will strip easily at the phillips head. I used a 10mm socket to tighten them. I snapped one off but I guess I didn't drill a large enough pilot hole for it to mount to the bracket on my 2000 Chevy Silverado Z71. I also flushed the transmission while I had the stock cooler off. I used some clear 3/8" hose and ran it into a bucket. I started the truck and while the dark old fluid was coming out I was pouring in new fluid until it was coming out red. Then I installed the cooler, added more fluid, started the truck, and kept adding fluid until it was at the proper level. I think I flushed about 3 gallons (12 quarts) through it to get the dark fluid out. I ended up buying 5 gallons of fluid total (in gallon jugs from Walmart) and I have about a half jug left after the trans was full. If you don't need to flush yours out you won't need as much fluid.

### ⭐⭐⭐⭐⭐ would definitely purchase again!
*by A***R on November 18, 2025*

Bought a camper which we started towing with my 2004 Nissan Armada. However, when we started towing, we noticed the transmission getting hot. After researching, I realized that the factory transmission cooler is not big enough, especially for towing, so I looked into an exterior trans cooler. This one had excellent ratings, so I gave it a shot, and it has been amazing. I disconnected the stock transmission cooler, which is in the radiator and installed this external unit in its place. I am so happy I did. Our trans temp has not been elevated since we put this cooler in. It is well built and appears ready to last for the long haul. Could not be happier.

### ⭐⭐⭐⭐⭐ Quality.
*by L***S on November 14, 2025*

Works great, easy install. I ordered -6 a fittings and ptfe lines. I went from normal 175 cruising and 210/215 in stop and go traffic down to 170 in heavy stop and go traffic and drops immediately to 150s once you get moving again in about 80* Cali weather, car has a built LS engine with 4l80e. I did bypass the radiator completely.

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-01-25*