How often should the transmission fluid be replaced?
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Q:

How often should the transmission fluid be replaced?

A:

Quick Answer

The transmission fluid should be replaced on a regular basis. Regardless of having a manual or automatic transmission fluid, regularly changing it will avoid costly transmission repairs.

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Full Answer

Transmission fluid is a greasy lubricant for all moving parts inside a vehicle's transmission. In an automatic transmission, the fluid acts as a coolant, transmitting power from the engine to the transmission. Manual transmissions use different fluids, such as oils, motor oils and hypoid gear oils.

Most car manufacturers recommend a change in manual transmission fluid every 30,000-60,000 miles. For automatic transmission fluid, some car makers suggest a change every 40,000 miles. For practical purposes and to avoid expensive repair costs, the transmission fluid should be replaced regularly.

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    Changing the transmission fluid in a vehicle should take place based on the manufacturer's written recommendation, which ranges from 30,000 to 60,000 miles for manual transmissions and 60,000 to 100,000 miles for automatic transmissions. More frequent changes do not harm the components.

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    What is the difference between Dexron-II and Dexron-III?

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    What are signs of a bad transmission?

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    Signs of a bad transmission include clunking, whining and humming; lack of response while driving, such as when a car seems to have trouble switching gears; grinding or shaking; and low or leaking fluid. A burning smell, a dragging clutch and a noisy car in neutral are other warning signs.

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