---
product_id: 20958740
title: "Hayden Automotive 777 Rapid-Cool 37mm Heavy Duty Engine/Transmission Cooler"
brand: "hayden automotive"
price: "$296.78"
currency: USD
in_stock: true
category: "Hayden Automotive"
url: https://www.desertcart.us/products/20958740-hayden-automotive-777-rapid-cool-37mm-heavy-duty-engine-transmission
store_origin: US
region: United States of America
---

# 12 fittings for max flow capacity Compact 1.75" x 6.6" x 12.9" size Supports GVWR up to 24,000 lbs Hayden Automotive 777 Rapid-Cool 37mm Heavy Duty Engine/Transmission Cooler

**Brand:** hayden automotive
**Price:** $296.78
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay Cool, Haul Hard: The Ultimate Heavy-Duty Cooler for Power Players 🚛

## Quick Answers

- **What is this?** Hayden Automotive 777 Rapid-Cool 37mm Heavy Duty Engine/Transmission Cooler by hayden automotive
- **How much does it cost?** $296.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/20958740-hayden-automotive-777-rapid-cool-37mm-heavy-duty-engine-transmission)

## 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.

## 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 |
| Best Sellers Rank | #2,900,782 in Automotive ( See Top 100 in Automotive ) #925 in Automotive Replacement Engine Coolers |
| Brand Name | Hayden Automotive |
| Color | Black |
| Cooling Method | Passive |
| Customer Reviews | 4.8 4.8 out of 5 stars (6) |
| Defrost System Type | Automatic |
| Form Factor | Compact |
| Global Trade Identification Number | 00036752007776 |
| Included Components | Transmission Cooler |
| Installation Type | Countertop |
| Item Highlight | Replaces 904226 918220 918279 918285 4120002. Direct-fit OE-grade replacement. |
| Item Type Name | Transmission Cooler |
| Item Weight | 2.9 pounds |
| Manufacturer | Hayden Automotive |
| Manufacturer Part Number | 777 |
| Model Name | Transmission Cooler |
| Model Number | 777 |
| Number of Items | 1 |
| Size | 1-3/4 inch X 6-5/8 inch X 12-15/16 inch |
| UPC | 036752007776 |
| Unit Count | 1 Count |
| Warranty Description | 1 year or 12K Miles |

## Product Details

- **Brand:** Hayden Automotive
- **Color:** Black
- **Cooling Method:** Passive
- **Defrost System:** Automatic
- **Form Factor:** Compact
- **Global Trade Identification Number:** 00036752007776
- **Installation Type:** Countertop
- **Item Weight:** 2.9 pounds
- **Model Name:** Transmission Cooler
- **Special Feature:** Compact

## Images

![Hayden Automotive 777 Rapid-Cool 37mm Heavy Duty Engine/Transmission Cooler - Image 1](https://m.media-amazon.com/images/I/71D0tbxtIrL.jpg)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-10-06*