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What's the Difference Between Gear Oil and Transmission Fluid?

The most obvious answer to this question is that gear oil is generally intended for use in manual gear boxes and transmission fluid is for automatic transmissions. However, as is always the case with automotive lubricants, there are exceptions to this rule. In order to fully understand what the differences are between the fluids, we first have to take a look at the key differences between gearboxes and transmissions.

How Healthy Is Your Transmission Fluid?

Ask the average motorist and it’s likely they will know how and where to check their oil and coolant level but ask about transmission fluid and they might not be so savvy.