Harrison gets a start in Sydney
England, who have an unassailable 2-0 lead in the three-Test series, play Australia in Sydney on Saturday.
England are determined to complete a clean-sweep in the three-match series having already won the previous two Tests in Brisbane and Melbourne to retain the Cook Cup.
Harrison comes into an otherwise unchanged staring XV in place of James Haskell (Wasps), who has not recovered from a foot injury in time for the final Test at Allianz Park.
"You have to work extremely hard to earn an England cap so there was no temptation to make changes for the sake of change," said England head coach Jones.
"To play for England you have to be in the best 23 and that's what this selection represents.
"Teimana comes into the side at seven for James Haskell whose foot hasn't quite recovered from Saturday. Teimana has trained well throughout the tour and deserves his spot. He's an excellent defender and his robustness will be important to us at the start of the game. Jack Clifford is unlucky to miss out, but will finish the game for us.
"We've treated this week like a dress rehearsal for the World Cup because that what we're always building towards. To win a World Cup you have to win three big games in a row – we've won two so this third game is the most important game we'll play all year. It will be a good indication of where we are as a team.
"The players have enjoyed being in Coogee this week and the attitude to training has been absolutely first class. They have been inspired by the challenge of playing better for the last game. Credit has to go to the coaching staff, particularly Steve Borthwick, Paul Gustard, Neal Hatley and Glen Ella who have worked tirelessly to keep improving this squad of players.
"We're looking forward to playing in front of a full house at Allianz Stadium on Saturday and we are confident we can finish the job off with a win."
England: 15 Mike Brown, 14 Anthony Watson, 13 Jonathan Joseph, 12 Owen Farrell, 11 Jack Nowell, 10 George Ford, 9 Ben Youngs, 8 Billy Vunipola, 7 Teimana Harrison, 6 Chris Robshaw, 5 George Kruis, 4 Maro Itoje, 3 Dan Cole, 2 Dylan Hartley (captain), 1 Mako Vunipola.
Replacements: 16 Jamie George, 17 Matt Mullan, 18 Paul Hill, 19 Joe Launchbury, 20 Courtney Lawes, 21 Jack Clifford, 22 Danny Care, 23 Elliot Daly.
Date: Saturday, June 25
Venue: Allianz Stadium, Sydney
Kick-off: 20.05 AEST (11.05 BST; 10.05 GMT)
Referee: Nigel Owens (Wales)
Assistant referees: Craig Joubert (South Africa), Mike Fraser (New Zealand)
TMO: Ben Skeen (New Zealand)
