Mazda CX-9 Grand Touring 2009 Manual page 186

2005-08 TRANSMISSION Automatic Transaxle Overhaul (AW6A-EL) - CX-7, CX-9 & Mazda 6
41. Remove the snap ring using snap ring pliers.
CAUTION:
42. Remove the brake piston cover, B1 brake piston and the piston return spring.
2008 Mazda CX-9 Grand Touring
Fig. 41: Inspecting Print Mark Of Brake Band
Courtesy of MAZDA MOTORS CORP.
The brake piston cover will fly off due to the force of the piston
return spring.
Do not drop the brake piston cover.
Do not drop the B1 brake piston.
Fig. 42: Removing Snap Ring
Courtesy of MAZDA MOTORS CORP.