|
|
Content .. 1000 1001 1002 1003 ..
pressure port to main pressure. PCS2 pressure is directed through shift valve 1, shift valve 3, and After the shift to first range is complete, SS3 is de-energized followed closely by SS1 (timed to Control main pressure exhaust for pressure switch 2 is blocked by shift valve 2, keeping the If electrical power is interrupted while the transmission is in first range, SS2 is de-energized. If electrical power is interrupted while the transmission is in first range, moving the manual If electrical power is interrupted while the transmission is in first range, moving the manual
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
reverse clutch, keeping the clutch applied. PCS1 control pressure is then directed to the 3rd, 5th, If electrical power is interrupted while the transmission is in first range, resulting in only first, Fig. 524: Identifying Hydraulic Circuits Used In First Range SECOND RANGE (WITHOUT TCC APPLIED) Before shifting from first to second range, the transmission control module (TCM) makes certain IMPORTANT: If the manual selector valve is put back in a forward range after reverse has been attained, the selector valve will direct fluid to
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
shift valve 1, shift valve 2, and shift valve 3 are in the correct position with shift valve 1 and shift Pressure control solenoid 1 (PCS1) is energized, opening PCS1 signal pressure to exhaust and The combination of the 1-2-3-4 and the 2-6 clutch application produces second range operation. After the shift to second range is complete, SS2 is de-energized allowing shift valve 2 to de- Pressure switch 1, pressure switch 2, and pressure switch 3 turn off, providing feedback that the If electrical power is interrupted while the transmission is in second range, PCS1 and PCS2 de- If the torque converter clutch was applied during the power interrupt, the TCC solenoid is de- If electrical power is interrupted while the transmission is in second range and subsequent third
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
If electrical power is interrupted while the transmission is in second range with subsequent third Fig. 525: Identifying Hydraulic Circuits Used In Second Range SECOND RANGE (WITH TCC APPLIED (TOW-HAUL)) Energizing the torque converter clutch (TCC) solenoid strokes the TCC valve against the stop, Depending upon the calibration, TCC solenoid could be energized in ranges 2-6. The calibrations
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Content .. 1000 1001 1002 1003 ..
|
|
|