In the backline only two changes have been made. First five-eighth Marty McKenzie will start at 10 with injury ruling Jack Debreczeni out of contention. Anton Lienert-Brown returns to start at second five eighth in his 60th appearance for the Chiefs, moving Alex Nankivell to the bench.
Completing the changes to the 23, Taleni Seu earns his spot in jersey number 20 and is joined by Etene Nanai-Seturo who will don jersey number 23.
Cooper said his expectation was that his team would continue to deliver another strong performance this weekend.
"This week we want to continue to carry the momentum and confidence we have into the Jaguares match. The Jaguares are a very passionate team and they have a strong set piece. We need to maintain a high-tempo game and ensure our defence systems continue to improve, if we get that right then we should be in a good space."
Cooper is confident Allardice will lead the team by example in Retallick's absence.
"Michael is a good leader and provides plenty of experience to lead the team this week."
Gallagher Chiefs:
Aidan Ross (19)
Nathan Harris (49)
Nepo Laulala (22)
Michael Allardice (39) ©
Mitchell Brown (27)
Luke Jacobson (15)
Lachlan Boshier (35)
Tyler Ardron (15)
Brad Weber (62)
Marty McKenzie (20)
Solomon Alaimalo (28)
Anton Lienert-Brown (60)
Tumua Manu (5)
Sean Wainui (18)
Damian McKenzie (70)
Reserves:
Samisoni Taukei'aho (15)
Tevita Mafileo (5)
Angus Ta'avao (22)
Jesse Parete (13)
Taleni Seu (39)
Te Toiroa Tahuriorangi (23)
Alex Nankivell (13)
Etene Nanai-Seturo (5)