Change 1          2-565 TM 9-2320-365-34-1 Sub Code Shift From - To 01 1-2 2-N-2 4-3 4-5 6-5 6-7 R-1 R-2 R-N-1 R-2 N3-N2 99 79 78 72 71 56 34 54 32 08 Table 2-4.1.  C3 Pressure Switch PRESSURE TEST   (1)  Remove front and rear propeller shafts         (TM 9-2320-365-20-3).   (2)  Place drain pan under pressure tap.   (3)  Remove C3 pressure tap plug.   (4)  Connect boss to tube adapter, hose, and         pipe to tube adapter to C3 pressure tap.   (5)  Connect batteries (TM 9-2320-365-20-3).   (6)  Perform STE/ICE-R test #50 (TM 9-4910-         571-12&P).   (7)  Start engine (TM 9-2320-365-10).   (8)  With parking brake applied, make shift         indicated by sub code, refer to Table         2-4.1. C3 Pressure Switch, and note         reading on STE/ICE-R.   (9)  If STE/ICE-R indicates greater than 0 psi         (0 kPa), replace C3 solenoid regulator         valve (para 7-7). (10)  If STE/ICE-R indicates 0 psi (0 kPa),         replace C3 pressure switch (para 7-8). (11)  Shut down engine (TM 9-2320-365-10). (12)  Remove pipe to tube adapter, hose, and         tube to boss adapter from C3 clutch         pressure tap. (13)  Install C3 pressure tap plug and remove         drain pan. (14)  Install front and rear propeller shafts         (TM 9-2320-365-20-3).