Reverse Band Servo Assemble

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Inspection Areas On Reverse Band Servo

Courtesy of GENERAL MOTORS CORP.

Inspect the reverse band servo components for the following conditions:
- Damaged, worn or porous servo piston (44)
- Damaged servo piston oil seal ring (43)
- Damaged, worn or porous servo cover (40)
- Damaged servo cover O-ring seal (41)
- Damaged servo cover retaining ring (39)
- Broken or collapsed servo piston return spring (49)
- Broken or collapsed servo piston cushion springs (45, 47)
- Damaged or worn servo piston apply pin (48)

Fig 2: View Of Reverse Band Servo Assembly Components

Courtesy of GENERAL MOTORS CORP.

Assemble the servo piston (44), the servo piston cushion springs (45, 47), the servo piston cushion spring retainer (46) and the servo piston apply pin (48).
Install the servo pin retaining ring (42) onto the servo piston apply pin (48).
Install the servo piston oil seal ring (43) onto the servo piston (44).
Assemble the servo piston return spring (49) onto the servo assembly.

Fig 3: Identifying Reverse Servo Assembly Components

Courtesy of GENERAL MOTORS CORP.

Position the transmission so that the oil pan is facing down.
Install the servo cover O-ring seal (41) onto the servo cover (40).
Install the servo and cover assembly (40-49) into the case.

Fig 4: Identifying Reverse Servo Cover Snap Ring

Courtesy of GENERAL MOTORS CORP.

Use a long screwdriver in order to depress the reverse band servo cover (40) by prying against the transmission holding fixture.
Hold the reverse band servo assembly compressed.
Use a small screwdriver in order to install the reverse band servo cover retaining ring (39).
Remove the long screwdriver.