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5A-48 AUTOMATIC TRANSMISSION POWER FLOW - PARK AND NEUTRAL In Park and Neutral, there is no drive to the planetary gear set. The rear band is applied to eliminate ‘clunk’ on In Park the transmission is mechanically locked by engaging a case mounted pawl with teeth on the output shaft ring Control To maintain this arrangement in the steady state solenoids and valves are activated as follows: l Solenoids S1 and S2 are switched off. l Line (pump) pressure is applied to the primary regulator valve (PRV) and to the solenoid supply valve. l The converter, oil cooler, and lubrication circuits are charged from the primary regulator valve. l The line 500 circuit is charged by the solenoid supply valve. l The S5 circuit is charged by the variable pressure solenoid (S5). l Line pressure is prevented from entering the drive circuit by the manual valve. l The B1 circuit and all clutch circuits are open to exhaust. Refer to figure 5.1 and table 5.2. Table 5.2 - Engaged Elements - Park arid Neutral Gear State Park and Neutral C1 - C2 - C3 - C4 - B1 - B2 X 1-2 OWC - 3-4 OWC - LU CLUTCH - ELEMENTS ENGAGED |