Volvo C30, C70, S40 & V50
What the hazard is
The driver will be unable to change gears which could create an unsafe driving situation, however, the the driver will be able to stop the vehicle by depressing the clutch, brake and turning off the ignition.
What to do
Contact your Volvo Dealer to torque the nut for the ball joint to correct the torque.
Defect
The ball joint and cylinder pin on the gear shift lever may be mounted with an incorrect torque which can lead to the ball joint coming loose.