Suzuki Wagon R Manual page 3455

7B1-162 AUTOMATIC TRANSAXLE (M13 ENGINE MODEL)
3) Apply compressed air (400 – 800 kPa, 4 – 8 kg/cm
113 psi) to oil hole (2) of transaxle rear cover (1) to remove
O/D and 2nd coast brake piston.
4) Remove O/D and 2nd coast brake piston front O-ring (1) and
rear O-ring (2).
5) Remove rear cover seal rings (1).
6) Remove rear cover plugs (1).
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