--- product_id: 20958740 title: "777 Rapid-Cool 37mm Heavy Duty Engine/Transmission Cooler" brand: "hayden automotive" price: "1003.72 DT" currency: TND in_stock: true reviews_count: 1 category: "Hayden Automotive" url: https://www.desertcart.tn/products/20958740-777-rapid-cool-37mm-heavy-duty-engine-transmission-cooler store_origin: TN region: Tunisia --- # 12 fittings for max flow capacity Compact 1.75" x 6.6" x 12.9" size Supports GVWR up to 24,000 lbs 777 Rapid-Cool 37mm Heavy Duty Engine/Transmission Cooler **Brand:** hayden automotive **Price:** 1003.72 DT **Availability:** ✅ In Stock ## Summary > 🔥 Stay Cool, Haul Hard: The Ultimate Heavy-Duty Cooler for Power Players 🚛 ## Quick Answers - **What is this?** 777 Rapid-Cool 37mm Heavy Duty Engine/Transmission Cooler by hayden automotive - **How much does it cost?** 1003.72 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/20958740-777-rapid-cool-37mm-heavy-duty-engine-transmission-cooler) ## 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 - • **Compact Yet Mighty:** Space-saving dimensions fit easily in tight engine bays without compromising performance. - • **Extend Engine Life:** Every 20° drop in oil temperature can double your engine and transmission lifespan—don’t let heat be your downfall. - • **Built for Big Hauls:** Handles heavy loads with GVWR up to 24,000 lbs and towing capacity up to 5,000 lbs—perfect for trucks, vans, and motorhomes. - • **Heavy-Duty Cooling Power:** Plate and fin design delivers superior heat transfer to keep your engine and transmission running cooler, longer. - • **Maximized Flow Efficiency:** 12 precision-engineered fittings ensure optimal fluid flow, reducing overheating risks dramatically. ## Overview The 777 Rapid-Cool 37mm Heavy Duty Engine/Transmission Cooler by Hayden Automotive is a compact, plate and fin cooler engineered for high-capacity oil cooling. Designed for heavy vehicles like pick-up trucks, vans, and motorhomes with GVWR up to 24,000 lbs, it features 12 fittings for maximum flow and superior heat transfer. This cooler significantly reduces operating temperatures, extending engine and transmission life, making it an essential upgrade for professionals who demand reliability under heavy loads. ## Description Hayden's 37 millimeter heavy duty plate and fin coolers are ideal for transmission and engine oil cooling applications requiring higher flow range and increased heat transfer in a compact space. Over 14 million transmissions fail every year, 9 out of 10 from overheating. Every 20 degree drop in operating temperature can double oil and equipment life. Review: Oil Coolers Reduce Oil Temperature for Longer Engine Life - You will need to find a hydraulic hose shop to get a right angle fitting (2) that has a 1/2 inch smooth nipple for a push on hose.with a 1/2 inch inside diameter. You may need to go to Home Depot to get reduction fittings for a 1/2 inch inside diameter hose connected to a 3/8 inch inside diameter hose. This cooler is heavy duty for large vehicles so you may want to buy a cooler with smaller 3/8 inch diameter connects suitable for either oil or transmission fluid. ## Features - Size is 1-3/4 inch X 6-5/8 inch X 12-15/16 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 - Plate and fin, heavy duty, high capacity design - 12 fittings for maximum flow capacity ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0049ESKSM | | Additional Features | Compact | | Adjustable Temperature Control | No | | Best Sellers Rank | #1,482,008 in Automotive ( See Top 100 in Automotive ) #431 in Automotive Replacement Engine Coolers | | Brand | Hayden Automotive | | Brand Name | Hayden Automotive | | Color | Black | | Cooling Method | Passive | | Customer Reviews | 4.8 out of 5 stars 6 Reviews | | Defrost System | Automatic | | Defrost System Type | Automatic | | Form Factor | Compact | | Global Trade Identification Number | 00036752007776 | | Has Convertible Freezer | No | | Included Components | Transmission Cooler | | Installation Type | Countertop | | Is Electric | No | | Is Product Cordless | No | | Item Type Name | Transmission Cooler | | Item Weight | 2.9 Pounds | | Manufacturer | Hayden Automotive | | Manufacturer Part Number | 777 | | Model Name | Transmission Cooler | | Model Number | 777 | | Size | 1-3/4 inch X 6-5/8 inch X 12-15/16 inch | | Smart Home Compatibility | Not Smart Home Compatible | | Special Feature | Compact | | UPC | 036752007776 | | Unit Count | 1.0 Count | | Warranty Description | 1 year or 12K Miles | ## Product Details - **Adjustable Temperature Control:** No - **Brand:** Hayden Automotive - **Cooling Method:** Passive - **Defrost System:** Automatic - **Form Factor:** Compact - **Installation Type:** Countertop - **Is Electric:** No - **Item Weight:** 2.9 Pounds - **Model Name:** Transmission Cooler - **Special Feature:** Compact ## Images ![777 Rapid-Cool 37mm Heavy Duty Engine/Transmission Cooler - Image 1](https://m.media-amazon.com/images/I/71D0tbxtIrL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Oil Coolers Reduce Oil Temperature for Longer Engine Life *by R***A on April 26, 2026* You will need to find a hydraulic hose shop to get a right angle fitting (2) that has a 1/2 inch smooth nipple for a push on hose.with a 1/2 inch inside diameter. You may need to go to Home Depot to get reduction fittings for a 1/2 inch inside diameter hose connected to a 3/8 inch inside diameter hose. This cooler is heavy duty for large vehicles so you may want to buy a cooler with smaller 3/8 inch diameter connects suitable for either oil or transmission fluid. --- ## 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/20958740-777-rapid-cool-37mm-heavy-duty-engine-transmission-cooler](https://www.desertcart.tn/products/20958740-777-rapid-cool-37mm-heavy-duty-engine-transmission-cooler) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-11*