Tenor............vibrato?

hi....im a male opera singer, my lowest note is a C2 my highest is a G4 then in order to go higher i hafta "flip" my voice and i can reach a C6....the thing is that while i keep my voice "pushed"....you know with the larynx pulled in in the yawning position in order to sing with the deep and male voice, i cant do any vibrato.....how to sing in a vibrato voice those notes from C2 to G6????