The Hydra-Matic 4L60-E is a fully automatic rear wheel drive electronically
controlled transmission. It provides four forward ranges including overdrive and reverse.
The PCM controls shift points by means of two shift solenoids. Oil pressure is supplied
by a vane type oil pump and regulated by the PCM with a transmission pressure control
solenoid (force motor). Shift schedules and TCC apply rates are also controlled by
the PCM and are influenced by transmission temperature.
You can operate the transmission in any one of the following seven modes:
| • | P - Park position prevents the vehicle from rolling either forward
or backward. For safety reasons, use the parking brake in addition to the park position. |
| • | R - Reverse allows the vehicle to be operated in a rearward direction. |
| • | N - Neutral allows the engine to be started and operated while driving
the vehicle. If necessary, you may select this position in order to restart the engine
with the vehicle moving. |
| • | OD - Overdrive is used for all normal driving conditions. Overdrive
provides four gear ratios plus a converter clutch operation. Depress the accelerator
in order to downshift for safe passing. |
| • | D - Drive position is used for city traffic and hilly terrain. Drive
provides three gear ranges. Depress the accelerator in order to downshift. |
| • | 2 - Manual second provides acceleration and engine braking. |
| • | 1 - Manual Lo provides maximum engine braking. |
