WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of GENERAL MOTORS COMPANY
Callout
Component Name
1
3-8 Clutch Plate
2
3-8 Clutch Plate - Wave
3
6-7-8-9 and 5-7-Reverse Clutch Housing Thrust Bearing