Automatic, manual, CVT or dual-clutch transmission, front or rear differential: every part of your driveline depends on the right fluid, changed at the right time. Start here to understand how each system works, what fluid it needs and how to keep it shifting smoothly.
Automatic transmission fluid
- What is Transmission Fluid?
- Which Automatic Transmission Fluid Do I Need?
- How Often to Change Transmission Fluid (By Type)
- Why Change Transmission Fluid?
- Should I Change Fluid in a Filled-for-Life Transmission?
- Transmission Flush vs Fluid Change: Which is Better?
- Can I Use Transmission Fluid in Oil to Clean My Engine?
- Do Transmission Fluid Additives Work?
- How Does an Automatic Transmission Work?
- Common Fixes for a Transmission that Shifts Hard
- Advanced Transmission Technology Requires Advanced Protection
CVT, dual-clutch and manual transmissions
- What Is a CVT? How a Continuously Variable Transmission Works
- How Does a Dual-Clutch Transmission (DCT) Work?
- AMSOIL 100% Synthetic DCT Fluid: Protect the Thrill
- Manual vs. Automatic Transmission Fluid: The Difference
- See How the CVT Transmission in Your ATV Works
- Testing a Turbo UTV Dual-Clutch Transmission
Gear oil and differentials
- Limited-Slip Differential: How It Works and Which Gear Oil to Use
- How Often Should I Change Differential Fluid?
- GL-4 vs. GL-5 Gear Oil: What’s the Difference?
- What Is Hypoid Gear Oil? How It Compares to Regular Gear Oil
- How to Read a Gear Oil Viscosity Chart
- Gear Oil vs. Engine Oil: What’s The Difference?
- The New SEVERE GEAR Easy-Pack Makes Changing Gear Oil Easy
- Why Upgrade Your Differential Cover?
- Dissecting the Transfer Case
- Harley-Davidson Transmission Oil Change Instructions
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Brad Nelson is an AMSOIL Technical Writer II who develops content about lubricant technology, product performance and vehicle maintenance. He works with engineers and product specialists to translate testing, application requirements and approved performance claims into clear customer guidance. Nelson’s work includes AMSOIL Blog articles, AMSOIL Magazine features and technical explanations concerning motor oils, gear lubricants, vehicle systems and maintenance practices.
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