The 6-speed automatic transmission used in the 2006-2016 Volvo S60 is known for issues with harsh shifting, especially while the transmission is slightly warmer than normal operating temperature.
This is accompanied by slight transmission slippage, and is common with this transmission in various makes and models.
The transmission software sometimes causes the slipping and harsh shifts, but in other cases the valve body or shift solenoids are to blame.
To remedy the situation, the manufacturer of the transmission has issues various software updates, but in some cases a valve body replacement or transmission rebuild is required.
The MAF sensors are prone to failing and turning on the Check Engine Light .
Several complaints have been reported regarding Volvo S60 transmission shifting issues. Long shift times between gear shifts, hard shifting, hard downshifting and a loss of transmission operation all together to name a few.
If the issue is minor, a transmission software update may fix this issue. If available, the software should be updated before any repairs are made.
There are several technical service bulletins (TSB's) available from Volvo that address these shifting issues and they should be consulted by the repair shop during the automatic transmission diagnostic process.
Regular servicing of the transmission fluid can help with preventing transmission failure, but not in all cases. Follow the suggested fluid replacement interval recommended by Volvo. You will find this in your owners manual, or find it here: http://bit.ly/Volvo_Owners_Manuals
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