wit trip tonic, u can switch between automatic and manual, but without a clutch. depending on cars, i can move the gear lever up or down to shift gears up, and wise-versa for gear down. the advantage wit triptonic is sharper steering, better performance, depending on car, a different exhaust note. the disadvantage is lower gas mileage, and the transmission s working twice as hard as it is used most of the time, therefore it lowers the life of ur transmission.
tip: to ease the shifts on the transmission, let go of the gas and then shift up. this will take more gas but better for ur transmission. if u dont do that and just shift up without takn ur foot off the gas pedal, then u ill save lotta gas, but ur transmission's life will decrease.