renault scenic jumping out of gear ?

When the transmission computer detects a fault it will go into fail-safe (third). No solenoids are activated hence it can thump due to no pressure regulator solenoid working. Rebooting the computer by restarting the car will clear for a while. Codes need to be read. Most common is pressure regulation. for specialist in your area www.fedauto.co.uk

mags
April 2010