According to Volvo's maintenance schedule, the transmission fluid and filter in a Volvo S60 should be changed every 120,000 miles or 8 years, whichever comes first. However, some mechanics recommend changing the transmission fluid and filter more frequently, such as every 60,000 miles or 4 years, especially if you drive in severe conditions or tow heavy loads.
It's important to follow the manufacturer's recommended maintenance schedule to ensure that your vehicle's transmission operates properly and lasts as long as possible.
