--- product_id: 319997045 title: "40k Transmission Oil Cooler lpd47391 with Thermal Bypass Valve 708-4739P6 Compatible with tru Cool Heavy Duty 40,000 GVW Max - Low Pressure Drop Trans Cooler" brand: "gagsu" price: "VT50082" currency: VUV in_stock: true reviews_count: 8 category: "Gagsu" url: https://www.desertcart.vu/products/319997045-40k-transmission-oil-cooler-lpd47391-with-thermal-bypass-valve-708 store_origin: VU region: Vanuatu --- # Complete mounting hardware 40,000 lbs GVW capacity Low pressure drop tech 40k Transmission Oil Cooler lpd47391 with Thermal Bypass Valve 708-4739P6 Compatible with tru Cool Heavy Duty 40,000 GVW Max - Low Pressure Drop Trans Cooler **Brand:** gagsu **Price:** VT50082 **Availability:** ✅ In Stock ## Summary > ❄️ Keep your transmission chill and your haul unstoppable! ## Quick Answers - **What is this?** 40k Transmission Oil Cooler lpd47391 with Thermal Bypass Valve 708-4739P6 Compatible with tru Cool Heavy Duty 40,000 GVW Max - Low Pressure Drop Trans Cooler by gagsu - **How much does it cost?** VT50082 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/319997045-40k-transmission-oil-cooler-lpd47391-with-thermal-bypass-valve-708) ## 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—built to handle your toughest hauls with ease. - • **Plug & Play Installation:** Includes all premium mounting hardware for a seamless, hassle-free setup—get back on the road faster. - • **Extended Transmission Life:** Optimized heat dissipation keeps your transmission running cooler, reducing wear and costly repairs. - • **Worry-Free Warranty & Support:** Backed by a 3-year warranty and dedicated after-sales team—your peace of mind on every mile. ## Overview The Gagsu LPD47391 40k Transmission Oil Cooler is a heavy-duty aluminum cooler designed for vehicles up to 40,000 lbs GVW. Featuring advanced low-pressure drop technology, it ensures efficient cooling with minimal energy loss. The kit includes all necessary mounting hardware for easy installation and is backed by a 3-year warranty and responsive customer support, making it a reliable upgrade for commercial trucks, trailers, and towing vehicles. ## Description Inline Thermal Bypass Valve for Transmission Coolers is designed to improve cold-weather performance in automatic transmission systems. It installs directly in the fluid line and allows the fluid to bypass the cooler until reaching optimal temperature. Recommended for use in regions with freezing temperatures or for setups that require warm-up flow control. Suitable for 5/16"" and 3/8"" hose applications. ★★ Product Features ★★ ✔ Inline thermal valve for transmission cooler lines ✔ Compatible with 5/16"" and 3/8"" line sizes ✔ External mounting design ✔ Opens fully around 180°F (82°C) for stable fluid regulation ✔ Helps maintain transmission pressure during cold starts ♦♦ Installation Notes ♦♦ ✔ Installs in-line between cooler and transmission return ✔ Can be used as an add-on for existing cooler systems ✔ Not specific to any brand or vehicle — universal fit based on line size ## 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,Transmission Cooler External Thermal Bypass, 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 | B0F99CJL9X | | Best Sellers Rank | #93,984 in Automotive ( See Top 100 in Automotive ) #31 in Towing Hitch Engine Oil Coolers & Kits | | Brand | Gagsu | | Customer Reviews | 4.2 4.2 out of 5 stars (678) | | Date First Available | May 20, 2025 | | Exterior | Metal | | Item Weight | 6.24 pounds | | Item model number | LPD47391 | | Manufacturer | Gagsu | | Manufacturer Part Number | LPD47391 | | Model | LPD47391 | | Package Dimensions | 25.5 x 10.5 x 2.93 inches | ## Product Details - **Brand:** Gagsu - **Item Weight:** 2.84 Kilograms - **Material:** Aluminum - **Package Information:** Tube - **Recommended Uses For Product:** Automotive ## Images ![40k Transmission Oil Cooler lpd47391 with Thermal Bypass Valve 708-4739P6 Compatible with tru Cool Heavy Duty 40,000 GVW Max - Low Pressure Drop Trans Cooler - Image 1](https://m.media-amazon.com/images/I/71E+gd72qsL.jpg) ![40k Transmission Oil Cooler lpd47391 with Thermal Bypass Valve 708-4739P6 Compatible with tru Cool Heavy Duty 40,000 GVW Max - Low Pressure Drop Trans Cooler - Image 2](https://m.media-amazon.com/images/I/61CaQ2mByeL.jpg) ![40k Transmission Oil Cooler lpd47391 with Thermal Bypass Valve 708-4739P6 Compatible with tru Cool Heavy Duty 40,000 GVW Max - Low Pressure Drop Trans Cooler - Image 3](https://m.media-amazon.com/images/I/71pO2EoMEgL.jpg) ![40k Transmission Oil Cooler lpd47391 with Thermal Bypass Valve 708-4739P6 Compatible with tru Cool Heavy Duty 40,000 GVW Max - Low Pressure Drop Trans Cooler - Image 4](https://m.media-amazon.com/images/I/71v6TOteayL.jpg) ![40k Transmission Oil Cooler lpd47391 with Thermal Bypass Valve 708-4739P6 Compatible with tru Cool Heavy Duty 40,000 GVW Max - Low Pressure Drop Trans Cooler - Image 5](https://m.media-amazon.com/images/I/71-KuKDM9rL.jpg) ## Available Options This product comes in different **Color** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by D***S on February 24, 2026* ### ⭐⭐⭐⭐⭐ Review *by L***7 on June 8, 2023* ### ⭐⭐⭐⭐⭐ Review *by B***R on October 27, 2025* ## Frequently Bought Together - Gagsu 40k Transmission Oil Cooler lpd47391 Compatible with tru Cool Heavy Duty 40,000 GVW Max - Low Pressure Drop Trans Cooler - 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.vu/products/319997045-40k-transmission-oil-cooler-lpd47391-with-thermal-bypass-valve-708](https://www.desertcart.vu/products/319997045-40k-transmission-oil-cooler-lpd47391-with-thermal-bypass-valve-708) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-05*