Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Shift Controls

The Hydra-matic 4T60-E uses two ON/OFF shift solenoid valves with a 2-port design that provides for all forward gear ranges. These shift solenoid valves work together in a combination of ON or OFF sequences to direct fluid pressures to the various shift valves and apply components. The following shows the solenoid state for each gear range:

Park, Reverse, Neutral
Solenoid 1-2 ON
Solenoid 2-3 ON
First
Solenoid 1-2 ON
Solenoid 2-3 ON
Second
Solenoid 1-2 OFF
Solenoid 2-3 ON
Third
Solenoid 1-2 OFF
Solenoid 2-3 OFF
Fourth
Solenoid 1-2 ON
Solenoid 2-3 OFF