---
product_id: 477657230
title: "Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010"
brand: "wit whatever it takes transmission parts, inc"
price: "A$93"
currency: AUD
in_stock: true
reviews_count: 13
category: "Wit Whatever It Takes Transmission Parts, Inc"
url: https://www.desertcart.com.au/products/477657230-superior-6l80-6l90-8l90-sure-cool-system-upgrade-stl010
store_origin: AU
region: Australia
---

# Built-in safety bypass Immediate fluid level check 20% cooler operating temps Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010

**Brand:** wit whatever it takes transmission parts, inc
**Price:** A$93
**Availability:** ✅ In Stock

## Summary

> 🔥 Cool your transmission, heat up your drive!

## Quick Answers

- **What is this?** Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010 by wit whatever it takes transmission parts, inc
- **How much does it cost?** A$93 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/477657230-superior-6l80-6l90-8l90-sure-cool-system-upgrade-stl010)

## Best For

- wit whatever it takes transmission parts, inc enthusiasts

## Why This Product

- Trusted wit whatever it takes transmission parts, inc brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Boost ATF Longevity:** Extend transmission fluid life for fewer maintenance headaches.
- • **Safety Bypass Built-In:** Protect your system from overheating during heavy loads.
- • **Proven Performance Drop:** Cut temps by up to 90° even in scorching traffic conditions.
- • **Instant Fluid Level Accuracy:** No warm-up wait—know your transmission’s status immediately.
- • **Slash Transmission Heat by 20%:** Keep your ride cooler and safer under pressure.

## Overview

The Sure Cool System Upgrade STL010 by WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC is a high-performance transmission cooling enhancement that reduces operating temperatures by up to 20%, provides immediate and accurate fluid level readings without warm-up, and features a built-in safety bypass to prevent overheating. Trusted by thousands with a 4.8-star rating, it extends ATF life and ensures reliable transmission performance even under heavy load and extreme ambient temperatures.

## Description

Buy WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010: Hard Parts - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: It really works. - Installation was tricky for me but,... simple enough to accomplish. My transmission temps gave been lowered between 60-90° from high to low ambient temperatures. In warmer weather I was getting 191-197° in traffic and now it is running 100-112° in cold weather and 120-136° in warmer weather. It Works. GET IT, INSTALL IT.
Review: Save your Transmission - "The WIT Cure Cool System Upgrade for my transmission has been nothing short of transformative. Before installing this upgrade, my transmission was running hot at a concerning 194 degrees. This high temperature not only worried me about potential damage but also impacted the transmission's performance. After installing the Cure Cool System Upgrade, I saw an immediate and dramatic improvement. My transmission temperature dropped significantly, now consistently running at a much cooler 140 degrees. This 54-degree reduction is impressive. The installation process was straightforward, and the quality of the WIT parts was evident. For anyone struggling with transmission heat issues, I highly recommend the WIT Cure Cool System Upgrade. It's a cost-effective solution that delivers real, measurable results."

## Features

- Built in safety bypass Immediate cooler fill.
- Immediate accurate fluid level check without warm-up cycle
- Reduced average operating temperatures by as much as 20%
- Reduced risk of overheat while under load, Increased ATF life.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BCL9M23T |
| Best Sellers Rank | #10,494 in Automotive ( See Top 100 in Automotive ) #2 in Automotive Replacement Transmission Hard Parts |
| Brand | WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,391) |
| Date First Available | August 31, 2022 |
| Item Weight | 3.87 ounces |
| Item model number | STL010 |
| Manufacturer | Superior |
| Manufacturer Part Number | STL010 |
| Model | COOLER FLOW BYPASS |
| Product Dimensions | 4 x 4 x 1 inches |

## Images

![Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010 - Image 1](https://m.media-amazon.com/images/I/61C9sS0UHhL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ It really works.
*by E***N on December 15, 2025*

Installation was tricky for me but,... simple enough to accomplish. My transmission temps gave been lowered between 60-90° from high to low ambient temperatures. In warmer weather I was getting 191-197° in traffic and now it is running 100-112° in cold weather and 120-136° in warmer weather. It Works. GET IT, INSTALL IT.

### ⭐⭐⭐⭐⭐ Save your Transmission
*by J***H on August 8, 2024*

"The WIT Cure Cool System Upgrade for my transmission has been nothing short of transformative. Before installing this upgrade, my transmission was running hot at a concerning 194 degrees. This high temperature not only worried me about potential damage but also impacted the transmission's performance. After installing the Cure Cool System Upgrade, I saw an immediate and dramatic improvement. My transmission temperature dropped significantly, now consistently running at a much cooler 140 degrees. This 54-degree reduction is impressive. The installation process was straightforward, and the quality of the WIT parts was evident. For anyone struggling with transmission heat issues, I highly recommend the WIT Cure Cool System Upgrade. It's a cost-effective solution that delivers real, measurable results."

### ⭐⭐⭐⭐⭐ Awesome upgrade.
*by J***C on December 19, 2025*

Absolutely recommend. I own a 2015 Chevy Silverado 1500 and this has dropped my transmission temps substantially. I was running 190F on a warm day and now consistently get between 130F and 140F. Easy install.

## Frequently Bought Together

- WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC 6L80 6L90 8L90 Sure Cool System Upgrade STL010
- atp automotive B-239 Automatic Transmission Filter Kit for GM Optional 6L80 Heavy-Duty 6-Speed Transmission
- ACDelco GM Original Equipment 10-9395 Dexron VI Automatic Transmission Fluid - 1 gal

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-04*