--- product_id: 708333326 title: "Lucky Seven 40k Transmission Oil Cooler lpd47391" brand: "lucky seven" price: "966.71 DT" currency: TND in_stock: true reviews_count: 5 category: "Lucky Seven" url: https://www.desertcart.tn/products/708333326-lucky-seven-40k-transmission-oil-cooler-lpd47391 store_origin: TN region: Tunisia --- # Complete mounting hardware included 40,000 lbs GVW capacity Low pressure drop tech for max cooling Lucky Seven 40k Transmission Oil Cooler lpd47391 **Brand:** lucky seven **Price:** 966.71 DT **Availability:** ✅ In Stock ## Summary > ❄️ Keep your transmission chill and your drive unstoppable! ## Quick Answers - **What is this?** Lucky Seven 40k Transmission Oil Cooler lpd47391 by lucky seven - **How much does it cost?** 966.71 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/708333326-lucky-seven-40k-transmission-oil-cooler-lpd47391) ## 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 - • **Advanced Heat Protection:** Maintains optimal transmission temps to extend lifespan and reduce costly repairs—drive smarter, not harder. - • **Heavy-Duty Cooling Power:** Engineered for trucks & trailers up to 40,000 lbs GVW—keep your rig running cooler under pressure. - • **Plug & Play Installation:** Includes all bolts, fasteners, and brackets for a secure, hassle-free setup—get back on the road faster. - • **Lifetime Warranty & Support:** Backed by dedicated after-sales service for peace of mind on every mile. - • **Efficient Low-Pressure Design:** Minimizes energy loss and system strain, boosting transmission efficiency and longevity. ## Overview The Lucky Seven 40k Transmission Oil Cooler LPD47391 is a heavy-duty cooling solution designed for vehicles with a maximum GVW of 40,000 lbs. Featuring advanced low-pressure drop technology, it optimizes transmission efficiency by reducing system pressure loss and heat buildup. The kit comes complete with all necessary mounting hardware for easy installation and is backed by a lifetime warranty, ensuring reliable performance and long-term protection for your transmission system. ## Description 40k Transmission Oil Cooler lpd47391 Compatible with tru cool Heavy Duty 40,000 GVW Max - low pressure drop trans cooler Review: Excellent Cooling Performance – Huge Temperature Drop While Towing - I installed the LPD47391 40K Transmission Oil Cooler on my Hummer H3, and the results have been outstanding. Before the installation, my transmission oil temperature would climb to around 116°C (241°F) when towing for about an hour. After installing this cooler, I completed a 5-hour towing trip, and the transmission temperature never reached 80°C (176°F). That's a massive improvement and exactly what I was hoping for. Installation was straightforward using only the included hardware and brackets. On the H3, I did have to make a few adjustments: Relocated the horn to create enough mounting space. Moved the wiring attached to the center support in front of the radiator. Mounted the cooler with the ports facing upward to help prevent air from becoming trapped inside the unit. One thing I chose not to use was the supplied hose. I couldn't find sufficient information regarding its pressure or temperature ratings, so for peace of mind I purchased 10 feet of hydraulic transmission-rated hose, cut it into two sections, and used that instead. Overall, I'm extremely happy with this cooler. The reduction in transmission temperature has been dramatic, and it has given me much more confidence when towing for extended periods. If you're looking for a heavy-duty transmission cooler and have the space to install it, I'd definitely recommend this one. Pros: Excellent cooling capacity Significant reduction in transmission temperatures Includes mounting hardware and brackets Solid construction Great for towing applications Cons: Included hose specifications are not clearly documented May require minor vehicle-specific modifications for mounting however i did not drill or cut anything, only used holes that were already there and parts that came with the radiator. Bottom line: A worthwhile upgrade that reduced my towing transmission temperatures from 116°C to under 80°C. Very satisfied with the purchase. Review: Terrible product. - Cooler lines blew out one day after install. As I am writing this July 2026 this cooler has now blown out between the plate and fin assembly. May have wrecked my transmission, dangerous and a fire hazard. Avoid this cooler ## 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 | B0D99MDZ1X | | Brand | Lucky Seven | | Customer Reviews | 4.0 4.0 out of 5 stars (139) | | Date First Available | 31 July 2024 | | Exterior | Brushed | | Item Weight | 113 g | | Item model number | LPD47391 40k | | Manufacturer | 40k Transmission Oil Cooler | | Manufacturer Part Number | LPD47391 40k | | Model | 40k Transmission Oil Cooler | | Product Dimensions | 10.16 x 7.62 x 7.62 cm; 113.4 g | ## Images ![Lucky Seven 40k Transmission Oil Cooler lpd47391 - Image 1](https://m.media-amazon.com/images/I/81S0F4hZs5L.jpg) ![Lucky Seven 40k Transmission Oil Cooler lpd47391 - Image 2](https://m.media-amazon.com/images/I/71Jgv-DYCAL.jpg) ![Lucky Seven 40k Transmission Oil Cooler lpd47391 - Image 3](https://m.media-amazon.com/images/I/61aN2AQfSAL.jpg) ![Lucky Seven 40k Transmission Oil Cooler lpd47391 - Image 4](https://m.media-amazon.com/images/I/81Vx5iGeasL.jpg) ![Lucky Seven 40k Transmission Oil Cooler lpd47391 - Image 5](https://m.media-amazon.com/images/I/81QoITPi5bL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent Cooling Performance – Huge Temperature Drop While Towing *by E***Z on 28 July 2026* I installed the LPD47391 40K Transmission Oil Cooler on my Hummer H3, and the results have been outstanding. Before the installation, my transmission oil temperature would climb to around 116°C (241°F) when towing for about an hour. After installing this cooler, I completed a 5-hour towing trip, and the transmission temperature never reached 80°C (176°F). That's a massive improvement and exactly what I was hoping for. Installation was straightforward using only the included hardware and brackets. On the H3, I did have to make a few adjustments: Relocated the horn to create enough mounting space. Moved the wiring attached to the center support in front of the radiator. Mounted the cooler with the ports facing upward to help prevent air from becoming trapped inside the unit. One thing I chose not to use was the supplied hose. I couldn't find sufficient information regarding its pressure or temperature ratings, so for peace of mind I purchased 10 feet of hydraulic transmission-rated hose, cut it into two sections, and used that instead. Overall, I'm extremely happy with this cooler. The reduction in transmission temperature has been dramatic, and it has given me much more confidence when towing for extended periods. If you're looking for a heavy-duty transmission cooler and have the space to install it, I'd definitely recommend this one. Pros: Excellent cooling capacity Significant reduction in transmission temperatures Includes mounting hardware and brackets Solid construction Great for towing applications Cons: Included hose specifications are not clearly documented May require minor vehicle-specific modifications for mounting however i did not drill or cut anything, only used holes that were already there and parts that came with the radiator. Bottom line: A worthwhile upgrade that reduced my towing transmission temperatures from 116°C to under 80°C. Very satisfied with the purchase. ### ⭐ Terrible product. *by N***K on 17 July 2026* Cooler lines blew out one day after install. As I am writing this July 2026 this cooler has now blown out between the plate and fin assembly. May have wrecked my transmission, dangerous and a fire hazard. Avoid this cooler ### ⭐⭐⭐⭐⭐ Awesome *by K***S on 11 June 2026* Awesome quality. Will be buying 2 more 1 for my son's Tahoe and 1 for his brothers truck. ## Frequently Bought Together - 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) - EVIL ENERGY 6AN Male to 5/8 x 18 Inverted Flare Thread Fitting Adapter Straight 2Pcs - EVIL ENERGY 6AN Fuel Line Kit, 6AN Nylon Braided Fuel Line Hose Fitting Kit CPE 20FT Black --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/708333326-lucky-seven-40k-transmission-oil-cooler-lpd47391](https://www.desertcart.tn/products/708333326-lucky-seven-40k-transmission-oil-cooler-lpd47391) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-19*