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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1536 (Automatic Transmission - 5AT - Introduction (2 Of 2)) >> Description and Operation >> Automatic Transmission Hydraulic Diagrams >> Low Range - Second Gear >> L Position: Driving in 2nd Gear

L Position: Driving in 2nd 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 OFF, and SS valve A and B stay ON. SS valve C is turned OFF, and SH C pressure (SC) is applied to the right side of shift valve C. Shift valve C is then moved to the left side, to switch the port of line pressure and CPC pressure. 2nd clutch pressure is changed to line pressure mode, and the 2nd clutch is engaged securely. The 1st clutch is also engaged. No power is transmitted because of the one-way clutch. The LS A pressure (56) from the AT CPC solenoid valve A is applied to the right side of the CPC valve A, and the line pressure (4) is changed to the CPC A pressure (4A) at the CPC valve A. The CPC A pressure is supplied to the shift valve D, which moves the shift valve D to the left and cuts the L/H clutch pressure (15) to the 1st-hold clutch and the 1st-hold accumulator.

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

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