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5A-28 AUTOMATIC TRANSMISSION Table 3.4 - Solenoid States and Functions Table 3.5 - Solenoid Logic for Static Gear States Solenoids 1 and 2 Solenoids 3 and 4 Solenoid 5 Solenoid 6 Solenoid 7 S1 and S2 are normally open On/off solenoids that set the selected gear. These solenoids determine static gear position by operating the shift valves. Refer to table 3.5. Note that S1 and S2 solenoids also send signal pres- sure to allow or prohibit rear band engagement. S3 and S4 are normally open On/off solenoids that combine to control shift quality and sequencing. S3 switches the clutch regulator valve off or on. S4 switches the front band regulator valve off or on. S5 is a variable force solenoid that ramps the pressure during gear changes. This solenoid provides the signal pressure to the clutch and band regulator, thereby controlling the shift pressures. S6 is a normally open On/off solenoid that sets the high/low level of line pressure, Solenoid off gives high pressure. S7 is a normally open On/off solenoid that controls the application of the converter clutch. Solenoid on activates the clutch. S2 ON ON OFF OFF OFF OFF OFF S1 ON OFF OFF ON OFF OFF OFF Gear 1st 2nd 3rd 4th Reverse Neutral Park |