Why does Volvo s60 2001 model jerk when accelerating from stop or braking down to stop. now it indicates transmission needs service. it has 170 000km on the clock?

The jerking sensation when accelerating from a stop or braking in your 2001 Volvo S60 may be due to several factors, including Transmission Fluid issues, worn-out transmission mounts, or a failing torque converter. The transmission needing service indication suggests that there could be low fluid levels, contamination, or internal wear affecting performance. It's advisable to have the transmission fluid checked and possibly replaced, along with a thorough inspection of the transmission system to diagnose any underlying problems. Ignoring these symptoms could lead to more severe transmission damage.