Manual Second - Second Gear
Manual Second - Second Gear (From Manual Third - Third Gear):
MANUAL SECOND - SECOND GEAR
A manual 3-2 downshift is initiated by moving the gear selector lever to the Manual Second (2) position. However, the transaxle will not downshift into Second gear until vehicle speed is below approximately 99 Km/h (62 mph). At higher vehicle speeds the PCM will keep 2-3 shift solenoid energized (ON) and the transaxle will operate in Manual Second - Third Gear as a safety precaution. In Manual Second the transaxle is hydraulically prevented from upshifting into Fourth gear under any conditions. Also. the coast clutch remains applied as in Manual Third and provides engine compression braking in Third and Second gears. The transaxle upshifts and downshifts between First and Second gears as in Overdrive range.
Manual Valve: Line pressure is routed into the D21 fluid circuit when the selector lever is moved into the Manual Second (2) position. Line pressure continues to feed the D321 fluid circuit as in Manual Third.
2-3 Shift Solenoid: The PCM de-energizes 2-3 shift solenoid when vehicle operating conditions are appropriate for a 3-2 downshift. With the solenoid OFF 2-3 signal fluid exhausts through 2-3 shift solenoid.
2-3 Shift Valve: Spring force moves the 2-3 shift valve into the Second gear position when 2-3 signal fluid exhausts. D21 fluid continues through the valve and is also routed into the intermediate band feed fluid circuit. 3-4 drive fluid, which feeds the direct clutch, exhausts past the 2-3 shift valve.
DIRECT CLUTCH RELEASES
Direct Clutch: Direct clutch fluid exhausts and the direct clutch releases.
#6 Checkball (Direct Clutch Release): Exhausting direct clutch fluid seats the #6 checkball and is forced through the #25 orifice to help control the direct clutch release.
2-3 Accumulator: Direct clutch feed fluid exhausts from the 2-3 accumulator, unseats the #5 checkball and exhausts past the 2-3 shift valve. 2-3 accumulator feed fluid fills the 2-3 accumulator as direct clutch feed fluid exhausts.
2-3 Accumulator Valve: The accumulator valve regulates line pressure into the 2-3 accumulator fluid circuit to fill the
2-3 accumulator: This regulation is basically controlled torque signal fluid pressure. Accumulator fluid pressure is regulated to a higher pressure with greater torque signal fluid pressure.
INTERMEDIATE / 4TH BAND APPLIES
1-2 Shift Valve: 1-2 Shift solenoid is OFF when the PCM commands Second gear and spring force holds the 1-2 shift valve in the upshifted position. Intermediate band feed fluid is routed through the valve and into the intermediate band fluid circuit.
#3 Checkball (Intermediate Band Apply): Intermediate band fluid pressure seats the #3 checkball and is forced through the #8 orifice. This orifice helps control the intermediate band apply.
Intermediate/4th Servo: Intermediate band fluid pressure is routed to the inner area of the intermediate/4th servo piston. This fluid pressure moves the servo piston and apply pin to apply the intermediate/4th band. The band provides engine compression braking in Manual Second - Second Gear.
PRESSURE CONTROL
Pressure Switch Assembly: D21 fluid from the 2-3 shift valve is routed to the Pressure Switch Assembly (PSA). The PSA signals the PCM that the manual valve is in the Manual Second position.
Pressure Control Solenoid: The PCM increases the PCS duty cycle to increase the operating range of torque signal fluid pressure in Manual Second. This provides increased line pressure for the additional torque requirements during engine compression braking and increased engine load in Manual Second.
Torque Converter Clutch: The PCM will release the Torque Converter Clutch (TCC) before downshifting into Manual Second. The TCC will not re-apply in Second gear under normal operating conditions.