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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1829 (Automatic Transmission - 5AT - Introduction (2 Of 2)) >> Description and Operation >> Automatic Transmission Hydraulic Diagrams >> Drive Range Fifth Gear - Torque Converter Clutch Released >> D Position: Driving in 5th gear

D Position: Driving in 5th gear

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The PCM turns shift solenoid (SS) valve C ON, and controls AT CPC solenoid valve A to release LS A pressure (56) in CPC valve A. SS valve A stays ON, and B stays OFF. The release of LS A pressure (56) in CPC valve A releases CPC A pressure in the 4th clutch pressure circuit. SS valve C is turned ON, and SH C pressure (SC) in the right side of shift valve C is released. SS C is then moved to the right side to switch the port of line pressure and CPC pressure. Line pressure (4), from the manual valve, becomes 5th clutch pressure (50) at the manual valve, via shift valve C, B, and A, and flows to the 5th clutch. The 5th clutch pressure is changed to line pressure mode by switching the position of shift valve C. The 5th clutch is engaged securely, and the 1st clutch is also engaged. No power is transmitted because of the one-way clutch.

When used, "left" or "right" indicates direction on the hydraulic circuit.