--- product_id: 1770212 title: "678 Universal Rapid-Cool 9.5” x 11” Add-On Transmission Cooler – Not for Direct Replacement of the OE Cooler" brand: "hayden automotive" price: "£82.28" currency: GBP in_stock: true category: "Hayden Automotive" url: https://www.desertcart.co.uk/products/1770212-678-universal-rapid-cool-9-5-x-11-add-on store_origin: GB region: United Kingdom --- # Compact 9.5” x 11” size Patented turbulation for max heat transfer Supports GVWR up to 24,000 lbs & towing 5,000 lbs 678 Universal Rapid-Cool 9.5” x 11” Add-On Transmission Cooler – Not for Direct Replacement of the OE Cooler **Brand:** hayden automotive **Price:** £82.28 **Availability:** ✅ In Stock ## Summary > ❄️ Keep your transmission chill and your ride unstoppable! ## Quick Answers - **What is this?** 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?** £82.28 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/1770212-678-universal-rapid-cool-9-5-x-11-add-on) ## 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 Compatibility:** Engineered for pick-up trucks, vans, Class C motorhomes, and trailers up to 24 feet - • **Precision Compact Design:** Sleek 9.5” x 11” cooler fits seamlessly without bulk - • **Complete Installation Kit:** Includes cooler, hose, and mounting hardware for hassle-free setup - • **Advanced Heat Transfer Tech:** Patented internal turbulation maximizes cooling efficiency with minimal pressure loss - • **Trusted Performance & Reliability:** Backed by a 1-year/12K mile warranty and 4.7-star rating from nearly 2,000 users ## Overview The Hayden Automotive 678 Universal Rapid-Cool Transmission Cooler is a compact, high-performance add-on cooler designed for heavy-duty vehicles like trucks, vans, and motorhomes. Featuring patented internal turbulation technology, it enhances heat transfer while minimizing pressure drop, ensuring optimal transmission temperatures during towing or heavy use. The kit includes everything needed for installation and is backed by a solid warranty and excellent customer reviews. ## 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. ## 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 | #23,249 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 1,987 Reviews | | Global Trade Identification Number | 00036752006786 | | Included Components | Transmisison Cooler | | Item Type Name | Transmisison Cooler | | Item Weight | 1.1 pounds | | Manufacturer | Hayden Automotive | | Model | 678 | | Mounting Type | Surface Mount | | Number of Items | 1 | | Number of Packs | 1 | | Operation Mode | Automatic | | Part Number | 678 | | UPC | 036752006786 | | Unit Count | 1 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 ![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) ![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) ![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. ## 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.co.uk/products/1770212-678-universal-rapid-cool-9-5-x-11-add-on](https://www.desertcart.co.uk/products/1770212-678-universal-rapid-cool-9-5-x-11-add-on) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-11-03*