How Often To Change Transmission Fluid Manual. 100,000 miles used to be a decent fluid change interval on a manual transmission. Automatic transmission fluid should be changed every 60,0000 to 75,000 miles instead.
But again, check your owner’s manual for the proper change and flush interval and use that as a guideline. Changing the transmission fluid used to be a staple of routine maintenance schedules, usually every 50,000 miles.
First check your owner’s manual to make sure you know whether a flush or change of transmission fluid is typically recommended for your vehicle. How often should i change my transmission fluid?