the French and British Grands Prix. Antônio Pizzonia then replaced him from the to the . Schumacher returned for the . Cristiano da Matta was replaced by test driver Ricardo Zonta from the onward. Zonta was dropped by Toyota for the before replacing Olivier Panis at the , who stepped down from his race seat and retired from the sport. Jarno Trulli's relationship with the Renault team deteriorated after his first victory at the 2004 Monaco Grand Prix. He left the team after the 2004 Italian Grand Prix, which was also Pantano's last race for the Jordan team. Former world champion Jacques Villeneuve replaced Jarno Trulli at Renault for the final three races. Trulli missed the 2004 Chinese Grand Prix, but he returned in the 2004 Japanese Grand Prix and the 2004 Brazilian Grand Prix with the Toyota team. That meant the 2004 Japanese Grand Prix was Jarno Trulli's first race with the new team. Team changes As part of a global restructuring and cost-cutting exercise, Ford announced during the season that they would not be entering into the F1 championship in 2005 via their Jaguar team. They also announced that their Cosworth motor and engineering divisions were being sold. The Jaguar team was eventually bought by Red Bull and continued to compete under the Red Bull Racing name in 2005. Regulation changes From the 2004 season onward, all the teams that did not finish in the top four in the previous year's Constructors' Championship were allowed to run a third car in the Friday practice session before each Grand Prix, for testing purposes. While other teams were permitted to have test drivers, they were not allowed to compete in the Friday practice. Sauber chose not to run its third driver in these sessions because of the added expense. The 2004 season also saw a change in technical regulations, including banning fully-automatic gearboxes and launch control, both of which had been used for the past three seasons. 2004 was the first time since the beginning of (pre-Spanish Grand Prix) that cars competed without these systems. However, the use of traction control was still permitted by the FIA, and continued to be allowed for use over the next three seasons, until it was banned for the 2008 season. Season calendar The 2004 Formula One calendar featured two new events: the Bahrain Grand Prix and the Chinese Grand Prix, held at two