---
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: "฿6703"
currency: THB
in_stock: true
reviews_count: 6
category: "Hayden Automotive"
url: https://www.desertcart.co.th/products/1770212-hayden-automotive-678-universal-rapid-cool-9-5-x-11
store_origin: TH
region: Thailand
---

# Compact 9.5” x 11” size Patented turbulation for max 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:** ฿6703
**Availability:** ✅ In Stock

## Summary

> ❄️ Stay Cool, Tow Hard: The Ultimate Transmission Chill Factor

## 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?** ฿6703 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/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 Capacity:** Engineered to handle GVWR up to 24,000 lbs and towing loads up to 5,000 lbs
- • **Durable Build Quality:** Thick 19mm hose barb fittings and robust aluminum construction ensure leak-free, long-lasting performance
- • **Easy Installation Kit:** Includes cooler, hose, and mounting hardware for a straightforward upgrade that keeps your transmission cooler and your ride smoother
- • **Precision Compact Design:** Fits seamlessly on trucks, vans & motorhomes without bulk
- • **Advanced Heat Transfer Tech:** Patented internal turbulation maximizes cooling efficiency with minimal pressure loss

## Overview

The Hayden Automotive 678 Universal Rapid-Cool Transmission Cooler is a premium, compact plate-and-fin cooler designed for pick-up trucks, vans, and Class C motorhomes. Featuring patented internal turbulation technology, it delivers superior heat transfer while minimizing pressure drop, supporting GVWR up to 24,000 lbs and towing up to 5,000 lbs. Built with durable aluminum and secure 19mm hose barb fittings, this kit includes everything needed for an easy installation that significantly lowers transmission temperatures, extending transmission life and enhancing vehicle performance.

## 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 | #15,247 in Automotive ( See Top 100 in Automotive ) #2 in Automotive Replacement Engine Coolers |
| Brand | Hayden Automotive |
| Connector Type | Hose Barb |
| Contact Material | Aluminum |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,883) |
| Date First Available | June 1, 2006 |
| Exterior | Machined |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.07 pounds |
| Item model number | 678 |
| Manufacturer | Hayden Automotive |
| Manufacturer Part Number | 678 |
| Model | Transmisison Cooler |
| Mounting Type | Surface Mount |
| Operation Mode | Automatic |
| Product Dimensions | 2.1 x 13.7 x 11.3 inches |
| UPC | 036752006786 |

## 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)

## 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!

### ⭐⭐⭐⭐⭐ Universal cooler kit
*by R***K on November 12, 2025*

Great item, working good so far. Install on XJ as extra transmission cooler and so far satisfied.

## 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

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-01-22*