![]() Got one of those fancy-new continuously-variable transmissions? You’ll need a special CVT oil for that, too.Īll told, there are dozens upon dozens of different automatic transmission fluids out there with specific applications. The bottles aren’t shy about telling you either-check the label for important phrases like “Compatible with Mercon” or “Exceeds Dexron III Specs” or “Recommended for Chrysler Vehicles.”Īs with engine oil, you’ll often have a choice between mineral, synthetic, and synthetic-blend ATF. The aftermarket has stepped up in recent years, and many lubricant companies now offer equivalent formulations. This Valvoline DEX/MERC works in certain Dexron and Mercon transmissions. They each require CVT fluid or DCT fluid, which are formulated specifically for their needs.Some fluids are cross-compatible with others. More vehicles today are using continuously variable transmissions (CVT) or dual-clutch transmissions (DCT). Though much simpler, the manual transmission fluid must maintain viscosity to enable crisp shifts and protect brass synchronizers against corrosion and wear. Manual transmissions require the driver to select the proper gear depending on driving conditions. This means the fluid must maintain its viscosity and remain clean to do its job properly. The fluid acts as a hydraulic fluid to actuate the transmission solenoids and clutch packs to enable smooth shifts. Your vehicle’s computer shifts gears automatically based on engine speed, load and other factors. Most modern vehicles use automatic transmissions, which commonly use 5-6 forward gears, but can include up to 10. ![]() Automatic TransmissionĪlthough they share the same purpose, automatic and manual transmissions differ significantly in design. Doing so may require specialized tools and a service manual, but it can be done on most "filled-for-life" transmissions. Although some vehicles today use “filled-for-life” transmissions that theoretically never require a fluid change, it’s best practice to change fluid in these units at least once during their lifetime, and more if you tow or haul. It’s also a good idea to use a transmission flush to help clean deposits or sludge that may reduce shift quality or component life. This helps keep your transmission clean and working reliably. If you tow or haul frequently, your fluid will require more-frequent changing. For best performance and long transmission life, change the fluid according to the maintenance guidelines given in your owner’s manual. Transmission maintenance can be easy to overlook – until something goes wrong and you’re faced with an expensive repair bill. Why should you change transmission fluid? As a result, synthetic transmission fluid delivers excellent wear protection to help your transmission last as designed, helps reduce heat to keep components clean and flows readily in the cold for smooth, crisp shifts. This allows formulators to use only molecules that serve a designed purpose. Instead, synthetic base oils are built from the ground up in the lab. Synthetic transmission fluid doesn’t contain the impurities inherent to conventional fluids distilled from crude oil. Like synthetic motor oil, synthetic transmission fluid offers several benefits compared to conventional transmission fluid, including improved wear protection, increased cleanliness, better heat resistance and smoother cold-weather shifts. AMSOIL Transmission Fluid What are the benefits of synthetic transmission fluid?
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