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Home >> Chevrolet >> 2005 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 707 (Automatic Transaxle - 4T80-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Description And Operation >> Automatic Transmission Hydraulic Diagrams >> Overdrive Range, 4-3 Downshift >> Notes

Overdrive Range, 4-3 Downshift: Notes

WARNING: This page is about a different car, the 2008 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.

When the transmission is operating in Fourth gear, a 4-3 downshift occurs if there is a significant change or increase in the throttle position, or if the load on the engine is increased. The torque converter clutch releases prior to the downshift occurring, which results in the following changes in the hydraulic system:

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