--- product_id: 611226387 title: "WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010 with Bypass Gasket" price: "$102.38" currency: USD in_stock: true reviews_count: 13 url: https://www.desertcart.us/products/611226387-wit-whatever-it-takes-transmission-parts-inc-superior-6l80-6l90 store_origin: US region: United States of America --- # Immediate fluid level check 20% cooler operation Built-in safety bypass WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010 with Bypass Gasket **Price:** $102.38 **Availability:** ✅ In Stock ## Summary > 🛠️ Keep your transmission chill and your drive thrill with the Sure Cool System Upgrade! ## Quick Answers - **What is this?** WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010 with Bypass Gasket - **How much does it cost?** $102.38 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/611226387-wit-whatever-it-takes-transmission-parts-inc-superior-6l80-6l90) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Upgrade:** Simple installation with included bypass gasket—get back on the road faster with zero leaks. - • **Safety First Bypass:** Integrated safety bypass valve ensures continuous cooler flow, protecting your transmission from heat damage. - • **Instant Fluid Accuracy:** Check your transmission fluid level immediately without waiting for warm-up cycles—precision at your fingertips. - • **Extend Transmission Life:** Lower operating temps mean longer ATF life and improved shift performance, keeping your ride smooth and reliable. - • **Stay Cool Under Pressure:** Reduces transmission temps by up to 20%, preventing costly overheating during heavy loads. ## Overview The WIT Whatever It Takes Superior Sure Cool System Upgrade STL010 is a precision-engineered transmission cooler bypass kit compatible with 2014+ 6L80/90E and 2016+ 8L80/90E models. Featuring patented flow-control technology and a built-in safety bypass, it reduces operating temperatures by up to 20%, enables immediate fluid level checks without warm-up, and extends ATF life. Easy to install with included bypass gasket, it’s a top-rated solution trusted by professionals to prevent overheating and improve transmission durability. ## Description Buy WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010 with Bypass Gasket: Transmissions & Parts - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Excellent product. - Easy to install, works very well. Mtransmission stays much cooler and shifts better under heavy load. Review: A must need product if your transmission is getting hot - I received my product and installed it the next day. Very simple to install. Instructions are easy to follow and so simple. Great fit, great value for the money and no leakage at all. Once installed my temperatures dropped by 40 degrees. I was running at 205 degrees, I am not running between 150 and 167 degrees. This is amazing. I am not having any durability issues at the moment. I recommend this product to anyone who is having a transmission heating issues or overheating issues. ## 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. - Includes Bypass Gasket ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CV6RDK5V | | Best Sellers Rank | #8,997 in Automotive ( See Top 100 in Automotive ) #44 in Automotive Replacement Transmissions & Parts | | Brand | WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC | | Customer Reviews | 4.8 4.8 out of 5 stars (460) | | Date First Available | February 7, 2024 | | Item Weight | 4.6 ounces | | Item model number | STL010 | | Manufacturer | Superior | | Manufacturer Part Number | STL010 | | Model | COOLER FLOW BYPASS | | Product Dimensions | 4 x 4 x 1 inches | ## Images ![WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010 with Bypass Gasket - Image 1](https://m.media-amazon.com/images/I/61jMu20b8ZL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent product. *by S***S on March 24, 2026* Easy to install, works very well. Mtransmission stays much cooler and shifts better under heavy load. ### ⭐⭐⭐⭐⭐ A must need product if your transmission is getting hot *by D***R on May 11, 2026* I received my product and installed it the next day. Very simple to install. Instructions are easy to follow and so simple. Great fit, great value for the money and no leakage at all. Once installed my temperatures dropped by 40 degrees. I was running at 205 degrees, I am not running between 150 and 167 degrees. This is amazing. I am not having any durability issues at the moment. I recommend this product to anyone who is having a transmission heating issues or overheating issues. ### ⭐⭐⭐⭐⭐ Includes the Gasket and Actually Keeps Temps Down *by B***C on May 21, 2026* fit my 2017 GMC Sierra with the 6‑speed exactly as it should. Everything lined up properly and installation was straightforward. It also does what it’s supposed to do as my transmission fluid temps are noticeably lower after installing it. This version includes the gasket, which isn’t strictly required, but it really should be replaced when removing and reinstalling the system. Buying it as part of the kit is cheaper than sourcing the gasket separately. Solid setup and well worth it. ## Frequently Bought Together - WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010 with Bypass Gasket - 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 --- ## 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.us/products/611226387-wit-whatever-it-takes-transmission-parts-inc-superior-6l80-6l90](https://www.desertcart.us/products/611226387-wit-whatever-it-takes-transmission-parts-inc-superior-6l80-6l90) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-07*