Transmission fluid plays a vital role in keeping your vehicle’s transmission system running smoothly and efficiently. Whether you’re using DEX II, DEX III, DEX VI, or CVT fluid, each type is designed for specific transmission systems and performance needs.
At Fubex Lubricants, we offer a wide range of high-quality transmission fluids that provide excellent protection, smooth shifting, and long-lasting performance, no matter what you drive.
Understanding DEXRON Transmission Fluids (DEX II, DEX III & DEX VI)
DEXRON is a trademark used by General Motors (GM) to identify its series of automatic transmission fluid (ATF) specifications. Over the years, DEXRON fluids have evolved to meet the increasing demands of modern transmission systems. Let’s take a closer look at the key types:
DEXRON-II (DEX II)
Introduced in the early 1970s, DEXRON-II was GM’s second-generation ATF. It offered significant improvements over the original Type-B fluid, including better friction control, oxidation stability, and overall performance. DEXRON-II became widely used throughout the 1980s and played an essential role in shaping modern transmission fluid technology.
DEXRON-III (DEX III)
Released in the early 1990s, DEXRON-III was developed to provide greater compatibility and improved performance for both GM and non-GM vehicles. It came in multiple versions—such as DEXRON-III(F), (G), and (H)—each offering enhanced durability, thermal stability, and oxidation resistance.
DEXRON-III became a popular multi-purpose ATF, used in a wide range of automatic transmissions, power steering systems, and hydraulic applications.
DEXRON-VI (DEX VI)
Introduced in 2005 for the 2006 model year, DEXRON-VI is a fully synthetic, high-performance ATF designed to replace DEXRON-III. It delivers better fuel efficiency, smoother shifting, and superior wear protection under both normal and extreme conditions.
DEXRON-VI meets the requirements of modern high-speed, electronically controlled transmissions, making it the recommended choice for newer GM vehicles.
At Fubex Lubricants, we offer premium-quality transmission fluids that meet or exceed DEXRON specifications, ensuring reliable performance, extended service life, and protection for your vehicle’s transmission system.
What is Transmission Fluid?
Transmission fluid is a specialized lubricant designed to protect and power a vehicle’s transmission system. It can be made from refined crude oil or through synthetic chemical processes, depending on whether the transmission is manual or automatic.
This fluid flows through the transmission system to lubricate moving parts, reduce friction, and prevent wear. It also helps cool the system, preventing overheating during operation.
In automatic transmissions, the fluid acts as a hydraulic medium, helping with gear shifts, torque converter operation, valve body function, and clutch engagement.
The main job of transmission fluid is to ensure smooth and efficient gear shifting. It keeps the internal components clean and running at the right temperature so that the transmission can deliver the right amount of power based on vehicle speed.
The Importance of Healthy Transmission Fluid
Transmission fluid is vital for keeping your vehicle’s transmission system running smoothly. It keeps all the internal parts lubricated, calm, and clean, helping your transmission perform efficiently over time.
When transmission fluid is low, dirty, or degraded, it puts stress on the system, leading to noticeable issues such as:
- Loss of power
- Overheating
- Unusual noises in neutral
- Fluid leaks under your car
- A burnt smell
- Slipping or hard gear shifts
- Grinding or shaking during driving
- Loud or roaring sounds
Ignoring these signs can result in severe damage and expensive repairs. That’s why it’s essential to regularly check the condition of your transmission fluid, especially its color and smell.
Also Read: The Role of Transmission Fluid: What It Does and When to Change It
What Color Should Transmission Fluid Be?
Transmission fluid is usually dyed a bright red color to make it easy to distinguish from other vehicle fluids. Some brands may also use blue or purple dye. When fresh, the fluid is clear and vibrant, but over time, it naturally darkens as it picks up heat and debris from the transmission.
A dark red color isn’t always a problem, but it’s a sign to monitor the fluid condition and consider future maintenance.
To check the color and level of your transmission fluid, many vehicles come equipped with a transmission fluid dipstick. This tool allows you to inspect the fluid’s appearance directly.
However, not all vehicles make it this simple. Newer models may not have a dipstick, meaning a visit to a mechanic or dealership may be required for proper inspection.
Always refer to your owner’s manual for guidance on checking and replacing transmission fluid. If you’re unsure, it’s recommended to consult a certified automotive technician to ensure proper maintenance based on your vehicle’s specifications.
Also Read: Does Oil Color Show Its Quality Or Need for A Change?
How to Fix Transmission Fluid Problems
If your transmission fluid looks brown or black, it may be time for a transmission fluid change or a complete flush.
A transmission fluid change involves draining out the old, dirty fluid and refilling the system with clean, fresh fluid. However, it typically leaves behind about 30% of the old fluid, which can reduce the overall effectiveness of the new fluid.
To ensure a more thorough clean, many vehicle owners choose a transmission fluid flush. This service uses special equipment to fully clean the transmission system, including the torque converter and cooler lines, before adding new fluid. It helps remove more contaminants and improves long-term performance.
If you’re planning to change the fluid yourself, always check your vehicle’s service manual to use the correct type of fluid. Using the wrong product can damage the transmission and lead to costly repairs.
Not sure which service is exemplary for you? It’s recommended to speak with a trusted transmission expert or consult your vehicle manufacturer for guidance. They can help you decide whether a change or a flush is best based on your car’s needs.
Understanding the Different Types of Automatic Transmission Fluid
Modern automatic transmissions are more advanced than ever before. With 8, 9, and even 10-speed gearboxes, today’s systems deliver better fuel efficiency, smoother shifting, and improved performance. However, this added complexity means using the correct automatic transmission fluid (ATF) is more important than ever.
At Fubex Lubricants, we offer a range of high-performance ATF products designed to meet the needs of modern transmissions, including ultra-low viscosity fluids for high-speed gearboxes.
Ultra-Low Viscosity ATF for Modern Transmissions
If you drive a vehicle with a 9- or 10-speed automatic transmission, such as select performance trucks or SUVs, you’ll need a ULV (Ultra-Low Viscosity) ATF. These advanced fluids are specifically engineered to reduce friction, improve fuel efficiency, and support the rapid gear changes of high-speed transmissions.
Fubex ATF is recommended for modern transmissions that require full-synthetic, low-viscosity fluid for enhanced protection and optimal performance under high pressure.
Multi-Vehicle Full Synthetic ATF – One Fluid for Many Cars
If you own multiple vehicles and want a simple solution, Fubex Multi-Vehicle Full Synthetic ATF is an ideal choice. It’s specially formulated to be compatible with a wide range of automatic transmissions, making it a versatile and reliable option for many light-duty cars and SUVs.
While it’s always important to follow your vehicle manufacturer’s specifications, Fubex Multi-Vehicle ATF delivers excellent performance, wear protection, and smooth gear shifts across most American, European, and Asian vehicles.
Continuous Variable Transmission (CVT) Fluid
CVTs (Continuously Variable Transmissions) are designed for maximum fuel efficiency and seamless power delivery. But CVTs operate differently from traditional automatics, and they require a specific fluid to match their unique design.
Fubex CVT Fluid is specially engineered to meet the demands of belt- or chain-driven CVT systems. It offers outstanding metal-to-metal protection, reduces wear, and supports longer transmission life, making it the recommended choice for drivers who want to keep their CVT performing at its best.
No matter what type of transmission your vehicle has, Fubex Lubricants offers the correct transmission fluid to ensure smooth operation, excellent protection, and long-lasting performance.
Final Takeaways
Maintaining the correct transmission fluid is essential for the health and performance of your vehicle. Whether you drive a car with a traditional automatic transmission, a high-speed gearbox, or a CVT system, using the correct fluid helps ensure smooth shifting, reduced wear, and long-term reliability.
At Fubex Lubricants, we provide a full range of premium-quality transmission fluids, including DEX II, DEX III, DEX VI, ULV ATF, multi-vehicle ATF, and CVT fluids—all formulated to meet or exceed industry standards. Trust Fubex to keep your transmission running smoothly, mile after mile.
FAQs
Q1: What is the difference between CVT fluid and ATF?
CVT fluid is made for belt and pulley systems, while ATF is for gear-based transmissions with clutches. Using the wrong fluid can cause damage and require a full flush.
Q2: Can I mix ATF with CVT fluid?
No, mixing ATF with CVT fluid can cause severe transmission damage. Always use the correct fluid type recommended for your vehicle.
Editor-at-Large
A passionate writer in the lubricant industry, Awais Iqbal has been covering oils, greases, and industrial fluids since the start of his career. At 25, he’s already written for blogs, catalogs, and brand guides across the UAE. Awais’s insights help companies connect with their audience, and his clear, helpful writing style is trusted by brands in the region.
