 Many of the March CG891s reliability problems was due to the casing used for the inboard gear cluster; this proved to have some flex and resulted in some gearbox failures in the first part of the season until the walls of the casing were made thicker. Many of the March CG891s reliability problems were due to the casing used for the inboard gear cluster; this proved to have some flex and resulted in some gearbox failures in the first part of the season until the walls of the casing were made thicker. Zvimwe zvikanganiso zvaiva pamusana pemagetsi emagetsi eJudd EV, nehurongwa hwepiston uye valvegear chete. Kunyange zvazvo Gugelmin kana Capelli vasina kuwana mapoinzi ekupedzisa neGC891, timu yakapedza 1989 Constructors Championship iri pa12th, yawana mapoinzi mana. Izvi zvaikonzerwa nenzvimbo yechitatu yaGugelmin ne881 pamutambo wokutanga wegore, Brazilian Grand Prix. 