Automatic gearbox. Some cars built between 25 April 2016 and 29 August 2016 that have an automatic gearbox might have a problem with the actuator, which could cause trouble when changing The C4 Cactus is a crossover of unique, personalised design and unequalled comfort. Today, it is consolidating its appeal in both of these areas with a new gearbox and a new special edition, already available for order: - The EAT6 automatic gearbox, mated to the PureTech 110 S&S engine. Designed for fast, smooth gear-changing, this new gearbox Automatic transmission failure. My Citroen cactus automatic transmission suddenly stopped working in the middle of traffic yesterday. Just stopped dead in london rush hour traffic. I'd be dead if I was in the outside lane of the motorway. Very scary. yJ9dl.