The Crusaders fell short in their bid to reach the Trans-Tasman showpiece match, which will be contested by the Blues and Highlanders.
The Highlanders moved closer to a Super Rugby Trans-Tasman play-off spot after the Hurricanes had been clinical against the Reds.
The Chiefs claimed four points to remain within reach of the top two ahead of the final round of Super Rugby Trans-Tasman fixtures.
The Brumbies secured only a second win for an Australian franchise in Super Rugby Trans-Tasman, stunning the Hurricanes.
The Blues and the Crusaders made it four wins from four in their Super Rugby Trans-Tasman campaigns by beating the Reds and Western Force.
The Chiefs did their best to produce a stunning comeback, but the Reds held on to secure a hard-fought victory.
Teams from New Zealand continue to dominate Super Rugby Trans-Tasman after the Hurricanes thrashed Western Force.
Richie Mo'unga shone as the Crusaders, winners of Super Rugby Aotearoa, thrashed Australian champions the Reds in their Trans Tasman clash.
The Hurricanes and the Highlanders each made it two wins from two games in Super Rugby Trans-Tasman.
Tense finishes went in the favour of the Crusaders and the Chiefs in Super Rugby Trans-Tasman, while the Blues were emphatic victors.