---
product_id: 53663035
title: "678 Rapid-Cool Add-On Transmission Cooler 11.0” x 9.50” x 0.75” with 4’ Hose"
brand: "hayden automotive"
price: "807 Lei"
currency: RON
in_stock: true
url: https://www.desertcart.ro/products/53663035-678-rapid-cool-add-on-transmission-cooler-11-0-x
store_origin: RO
region: Romania
---

# Dimensions: 11" x 9.5" x 0.75" Towing Capacity: 5,000 lbs Heat Transfer: Patented Turbulation 678 Rapid-Cool Add-On Transmission Cooler 11.0” x 9.50” x 0.75” with 4’ Hose

**Brand:** hayden automotive
**Price:** 807 Lei
**Availability:** ✅ In Stock

## Summary

> 🚀 Cool Your Ride, Conquer the Road!

## Quick Answers

- **What is this?** 678 Rapid-Cool Add-On Transmission Cooler 11.0” x 9.50” x 0.75” with 4’ Hose by hayden automotive
- **How much does it cost?** 807 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/53663035-678-rapid-cool-add-on-transmission-cooler-11-0-x)

## 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

- • **Lightweight Design:** Weighing only 485 g, it won’t add unnecessary bulk to your towing setup.
- • **Compact Yet Powerful:** Measuring just 11" x 9.5" x 0.75", this cooler fits seamlessly into your vehicle's setup.
- • **Built for Heavy-Duty Use:** Engineered for vehicles with a GVWR of up to 24,000 lbs, perfect for Class 'C' motor homes and travel trailers.
- • **Innovative Heat Management:** Patented internal turbulation technology enhances heat transfer while maintaining minimal pressure drop.
- • **Maximize Your Towing Potential:** Designed for pick-up trucks and vans, ensuring you can tow up to 5,000 lbs with confidence.

## Overview

The 678 Rapid-Cool Add-On Transmission Cooler by Hayden Automotive is a high-performance cooling solution designed for heavy-duty vehicles. With dimensions of 11" x 9.5" x 0.75" and a lightweight design of 485 g, it features patented internal turbulation technology that maximizes heat transfer while minimizing pressure drop. Ideal for towing up to 5,000 lbs and supporting vehicles with a GVWR of up to 24,000 lbs, this cooler is perfect for pick-up trucks, vans, and Class 'C' motor homes.

## Description

678 Rapid-Cool Add-On Transmission Cooler 11.0” x 9.50” x 0.75” with 4’ Hose

## 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 |
|---------------|-------|
| Manufacturer | Hayden Automotive |
| Brand | Hayden Automotive |
| Product Dimensions | 5.33 x 34.8 x 28.7 cm; 485.34 g |
| Item model number | 678 |
| Manufacturer part number | 678 |
| Lift type | Automatic |
| Item Weight | 485 g |

## Product Details

- **Connector type:** Hose Barb
- **Contact material:** Brass
- **Contact type:** Normally Open
- **Mounting type:** Surface Mount
- **Brand:** Hayden Automotive

## Images

![678 Rapid-Cool Add-On Transmission Cooler 11.0” x 9.50” x 0.75” with 4’ Hose - 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.

## 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 Romania*
*Store origin: RO*
*Last updated: 2026-02-26*