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Home >> Cadillac >> 2017 >> XTS Base >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6T70 (M7U M7W), 6T75 (M7V), Or 6T80 (Mhm) - Repair Instructions - Off Vehicle >> Repair Instructions - Off Vehicle >> Case Cover Assembly Assemble >> 2-6 and Low-Reverse Piston Function Inspection

2-6 and Low-Reverse Piston Function Inspection

Fig 1: 2-6 And Low-Reverse Piston Function Inspection
GM1875587Courtesy of GENERAL MOTORS COMPANY
2-6 and Low-Reverse Piston Function Inspection

Callout Component Name
1 Case Cover Assembly
NOTE:

The fluid seal rings should be in place and not damaged.

2 2-6 Clutch Feed Passage
CAUTION:

Regulate the air pressure to 40 psi maximum. High pressure could cause the piston to over travel and damage the piston seals.


Procedure 
Apply shop air to the 2-6 clutch feed. Observe the 2-6 piston movement.
NOTE:

Minimal piston movement and excessive air leaking could indicate damage to the 2-6 piston seals or improper assembly.

3 Low and Reverse Clutch Feed Passage
CAUTION:

Regulate the air pressure to 40 psi maximum. High pressure could cause the piston to over travel and damage the piston seals.


Procedure 
Apply shop air to the Low and Reverse clutch feed. Observe the Low and Reverse piston movement.
NOTE:

Minimal piston movement and excessive air leaking could indicate damage to the Low and Reverse piston seals or improper assembly.