Transmission fluid is important for the longevity and performance of your transmission. Learn how often you should change it, how much it costs, and how to test it. Find out the recommendations for different models and driving conditions, and the benefits of fresh fluid. Step 2 – Locate and remove the filler bolt. Once you have drained the fluid from your transmission and replaced the drain bolt, it is time to refill your transmission. Locate the fill bolt on your transmission and remove it using the 17mm bolt. You will need an extension to reach the bolt. Figure 2. Transmission Flush Frequency. Drain and fill every other to every 3rd oil change. Naturally the first time is a flush, depending on the condition and mileage. Once a year no more than two depending on color or slight change in driveabily. On my other cars drain and fill if lazy or else flush especially on the Volvo. ForesterBill. You need to find another Subaru dealer if you have one in your area. SOA does recommend a CVT fluid change if you tow so it's obviously not a lifetime fluid under that driving condition. Furthermore, Subaru Canada requires a CVT fluid change at 62k miles in order to maintain the extended CVT warranty there. Just the spin on. Regular duty change interval is at first oil change after 50,000 miles so you are entering the 'time to change' window. (Severe duty interval is 25000 miles). If changing to a TES-295 fluid it takes 2 changes to get the % synthetic high enough to use the extended drain intervals. You can do a double change and go to the FozzyX3. 1596 posts · Joined 2021. #16 · Jun 7, 2021. Aside from Subaru of America, nearly all of Subaru's distributors around the world (including Subaru Canada) recommend 60,000mi/100,000km as the "normal" interval for the CVTF. My dealer had no problem when I requested it along with the 60K service. csmeance. 1675 posts · Joined 2006. #9 · Apr 8, 2016. Fluid is cheaper than a new transmission! For 95% of drivers, I'd recommend replacing the transmission fluid with every 2nd or 3rd oil change. That works out to about every 20-30K miles depending on how your driving conditions are. The average price of a 2019 Ford F150 SuperCrew Cab transmission fluid change can vary depending on location. Get a free detailed estimate for a transmission fluid change in your area from KBB.com yvcEC.