The Grasshoppers all but ended Lexton’s finals hopes, claiming a tight win on Saturday.
The 9.8.62 to 5.5.35 win sees the Tigers slip two games outside the top eigth with only two rounds remaining.
Navarre started slowly in the sloppy conditions, trailing by one-point at quarter time.
The reigning premiers moved ahead in the second term, but were only able to hold onto a four point lead going into the final period.
Navarre kept the visitors scoreless to run away with the 27-point win.
Cody Driscoll was kept quiet, booting just two goals for Navarre, with Ben Martin also slotting two.
Brett Flood, Jesse Hannett and Josh Fowkes were among Navarre’s best players.
It will be a first against second clash in next weekends MCDFNL action, as Navarre travel to Carisbrook with the winner likely to become minor premiers.
The Redbacks handed Navarre its only loss of the season back in round five.