--- product_id: 1770212 title: "Hayden Automotive 678 Universal Rapid-Cool 9.5” x 11” Add-On Transmission Cooler – Not for Direct Replacement of the OE Cooler" brand: "hayden automotive" price: "472 zł" currency: PLN in_stock: true reviews_count: 8 url: https://www.desertcart.pl/products/1770212-hayden-automotive-678-universal-rapid-cool-9-5-x-11 store_origin: PL region: Poland --- # Compact 9.5” x 11” size Patented turbulation boosts heat transfer Supports GVWR up to 24,000 lbs & towing 5,000 lbs Hayden Automotive 678 Universal Rapid-Cool 9.5” x 11” Add-On Transmission Cooler – Not for Direct Replacement of the OE Cooler **Brand:** hayden automotive **Price:** 472 zł **Availability:** ✅ In Stock ## Summary > ❄️ Keep your transmission cooler than your competition—drive smarter, last longer! ## Quick Answers - **What is this?** Hayden Automotive 678 Universal Rapid-Cool 9.5” x 11” Add-On Transmission Cooler – Not for Direct Replacement of the OE Cooler by hayden automotive - **How much does it cost?** 472 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/1770212-hayden-automotive-678-universal-rapid-cool-9-5-x-11) ## Best For - hayden automotive enthusiasts ## Why This Product - Trusted hayden automotive brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Heavy-Duty Performance:** Engineered to handle GVWR up to 24,000 lbs and towing loads up to 5,000 lbs—built for the serious hauler. - • **Precision Compact Design:** Fits seamlessly on trucks, vans, and motorhomes up to 24 feet for sleek, space-saving cooling. - • **Complete Installation Kit:** Includes cooler, hose, and mounting hardware for a straightforward, professional-grade upgrade. - • **Advanced Heat Transfer Tech:** Patented internal turbulation maximizes cooling efficiency while minimizing pressure loss—keep your transmission chill under pressure. - • **Durable, Secure Connections:** 19mm thick hose barb fittings ensure leak-proof, rock-solid attachment for worry-free drives. ## Overview The Hayden Automotive 678 Universal Rapid-Cool Transmission Cooler is a premium, compact plate-and-fin cooler designed for pick-up trucks, vans, Class C motorhomes, and travel trailers up to 24 feet. Featuring patented internal turbulation technology, it significantly enhances heat transfer while minimizing pressure drop, supporting GVWR up to 24,000 pounds and towing capacities up to 5,000 pounds. With durable 19mm hose barb fittings and a complete installation kit, it offers a reliable, easy-to-install solution to extend transmission life and improve performance under heavy load conditions. ## Description This Is A Premium Style Transmission Cooler Kit. Coolers Are A Compact Plate And Fin Design. 19 Millimeter Thick-Hose Barb Fittings Offer Secure Attachment. All Rapid Coolers Include The Patented "Flow Path Design" Which Increases Heat Transfer While Minimizing Pressure Drop. Kits Contain Cooler, Hose And Mounting Hardware. Review: Super happy with these! Excellent quality! - First of all, the quality of the radiator itself is very very solid and well made. The heat sink fins are not too thin like many other aftermarket coolers. It’s very well made, and I’ve always had great luck with Hayden products, like their fan clutches, and transmission fittings. I originally bought a Chinese knockoff 40k trucool transmission cooler and I had to return it even before I even put it in my truck because of how poor the thickness of the radiator fins were. I could literally bend them with my finger nails. Did not feel comfortable about putting it in my truck. It was a massive leak waiting to happen. So I bought this Hayden cooler. It was actually cheaper than the 40k knockoff, and it’s much stronger and better built. I will be installing this tomorrow. EDIT: I installed these 2 days ago. Install was very easy, it look me about 3-4 hours because of all the custom mounting brackets I made, and all the hose routing with protective looms on it. But install was very easy and straightforward. I’ve been driving for the past two days with my scan tool hooked up to monitor the transmission temp, and I’m very happy to see that my transmission temperature does not go above 165F, even in slow stop and go traffic. Before I installed the cooler, my transmission temperature temp used to be around 190F-200F, but I’m glad to see how much cooler it is after the install. Very happy with the results, and this modification will definitely make my transmission last much longer. Review: Best Value and Quality Transmission Cooler Available Today - After Rebuilding my BAYA V6 transmission on my 7th Gen Accord, I needed something to keep the transmission cool since it does not have a transmission fluid cooler. This has kepty transmission happy and was very easy to install. It is an incredible value for the price and looks great once installed. As you can (or can't) see from the photo: the cooler fits perfectly with very little modification and blends in with the radiator. I installed it onto the frame and not the radiator to allow for better airflow. The finished fitment of the cooler was easy and very compatible within the area I installed it. The size is perfect for cooling and quick installation! Highly recommend this cooler setup from Hayden Automotive! ## Features - Size Is 3/4 Inch X 11 Inch X 9-1/2 Inch - Pick-Up Trucks And Vans, Class "C" Motor Homes , Travel Trailers To 24 Feet - Gvwr Up To 24,000 Pounds, Towing Up To 5,000 Pounds - Patented Internal Turbulation Increases Heat Transfer With Minimal Pressure Drop ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000C3DDKO | | Best Sellers Rank | #15,348 in Automotive ( See Top 100 in Automotive ) #2 in Automotive Replacement Engine Coolers | | Brand | Hayden Automotive | | Brand Name | Hayden Automotive | | Connector Type | Hose Barb | | Contact Material | Aluminum | | Customer Reviews | 4.7 out of 5 stars 1,945 Reviews | | Global Trade Identification Number | 00036752006786 | | Included Components | Transmisison Cooler | | Item Type Name | Transmisison Cooler | | Item Weight | 1.07 Pounds | | Manufacturer | Hayden Automotive | | Model | 678 | | Mounting Type | Surface Mount | | Operation Mode | Automatic | | Part Number | 678 | | UPC | 036752006786 | | Unit Count | 1.0 Count | | Warranty Description | 1 year or 12K Miles | ## Product Details - **Brand:** Hayden Automotive - **Connector Type:** Hose Barb - **Contact Material:** Aluminum - **Mounting Type:** Surface Mount - **Operation Mode:** Automatic ## Images ![Hayden Automotive 678 Universal Rapid-Cool 9.5” x 11” Add-On Transmission Cooler – Not for Direct Replacement of the OE Cooler - Image 1](https://m.media-amazon.com/images/I/81h6hePwK3L.jpg) ![Hayden Automotive 678 Universal Rapid-Cool 9.5” x 11” Add-On Transmission Cooler – Not for Direct Replacement of the OE Cooler - Image 2](https://m.media-amazon.com/images/I/41FNJu2a2AL.jpg) ![Hayden Automotive 678 Universal Rapid-Cool 9.5” x 11” Add-On Transmission Cooler – Not for Direct Replacement of the OE Cooler - Image 3](https://m.media-amazon.com/images/I/71fpAz2YFKL.jpg) ## Questions & Answers **Q: Anyone used this for a 3rd gen 4runner?** A: Yes, works great **Q: does it fit a 2009 toyota tacoma** A: Hello T. The 678 rapid-cool transmission cooler does not require any other fittings for it to be mounted for your application. So yes, it will work for your 2009 Toyota Tacoma. Bert CampRigid Hitch Amazon Sales **Q: how to install in 2007 nissan altima?** A: They have hardware to mount it directly to the back of your radiator. You attach it inline between the stock cooler and the transmission. **Q: Will this impact air condintioning performance?** A: It has not reduced the A/C cooling ( Miami, FL ) in my 2008 Equinox LTZ AWD 3.4L 6cyl , automatic Transmission Aisin Warner AF 33-5, except to lower the transmission coolant temperature by 20 degrees Fahrenheit while towing a Pop Up RV camper weighing a bout 2800 lbs. Good product. It will also increase the A/T fluid capacity by about 20 oz., obviously. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Super happy with these! Excellent quality! *by S***Y on June 6, 2025* First of all, the quality of the radiator itself is very very solid and well made. The heat sink fins are not too thin like many other aftermarket coolers. It’s very well made, and I’ve always had great luck with Hayden products, like their fan clutches, and transmission fittings. I originally bought a Chinese knockoff 40k trucool transmission cooler and I had to return it even before I even put it in my truck because of how poor the thickness of the radiator fins were. I could literally bend them with my finger nails. Did not feel comfortable about putting it in my truck. It was a massive leak waiting to happen. So I bought this Hayden cooler. It was actually cheaper than the 40k knockoff, and it’s much stronger and better built. I will be installing this tomorrow. EDIT: I installed these 2 days ago. Install was very easy, it look me about 3-4 hours because of all the custom mounting brackets I made, and all the hose routing with protective looms on it. But install was very easy and straightforward. I’ve been driving for the past two days with my scan tool hooked up to monitor the transmission temp, and I’m very happy to see that my transmission temperature does not go above 165F, even in slow stop and go traffic. Before I installed the cooler, my transmission temperature temp used to be around 190F-200F, but I’m glad to see how much cooler it is after the install. Very happy with the results, and this modification will definitely make my transmission last much longer. ### ⭐⭐⭐⭐⭐ Best Value and Quality Transmission Cooler Available Today *by N***A on December 14, 2025* After Rebuilding my BAYA V6 transmission on my 7th Gen Accord, I needed something to keep the transmission cool since it does not have a transmission fluid cooler. This has kepty transmission happy and was very easy to install. It is an incredible value for the price and looks great once installed. As you can (or can't) see from the photo: the cooler fits perfectly with very little modification and blends in with the radiator. I installed it onto the frame and not the radiator to allow for better airflow. The finished fitment of the cooler was easy and very compatible within the area I installed it. The size is perfect for cooling and quick installation! Highly recommend this cooler setup from Hayden Automotive! ### ⭐⭐⭐⭐⭐ Best Transmission Cooler *by R***T on January 25, 2026* Installed on a 98 Jeep Cherokee and it works great! The cooler does an amazing job at cooling the transmission and was well worth the time and money to install. It fits perfectly behind the grill and the hose is a match to the factory line size. The included zip ties have held up and you can barley tell they are there and it all fits cleanly behind the grille. ## Frequently Bought Together - Hayden Automotive 678 Universal Rapid-Cool 9.5” x 11” Add-On Transmission Cooler – Not for Direct Replacement of the OE Cooler - Hayden Automotive 253 Metal Mounting Bracket Kit - Magnefine 3/8" Magnetic Inline Transmission/Power Steering Filter --- ## 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.pl/products/1770212-hayden-automotive-678-universal-rapid-cool-9-5-x-11](https://www.desertcart.pl/products/1770212-hayden-automotive-678-universal-rapid-cool-9-5-x-11) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-29*