1996 Ford F150 Owner's Manual - Page 175

RWARNING Do not leave the vehicle unattended with the transfer case in the N (Neutral) position. Always set the parking brake fully and turn off the ignition when leaving the vehicle. Forced Downshifts To gain added acceleration in D (Drive) (when passing another vehicle) push the accelerator to the floor. The transmission will downshift to Second gear at speeds from about 35 to 55 mph (56 to 88 km/h) or to either First or Second gear at speeds under 35 mph (56 km/h). Power Braking Increasing the engine speed above idle without vehicle movement (such as holding the brake) in a forward or reverse gear causes transmission stall. Continued operation in the stall condition can result in transmission overheat, malfunction or fluid expulsion. Automatic Transmission Operation (E4OD and 4R70W) The E4OD and 4R70W transmissions are electronically controlled four speed automatic transmissions with overdrive. Transmission operation is controlled by the Powertrain Control Module (PCM). The PCM will automatically adjust transmission operation to make up for varying conditions. Several sensors located on the engine and transmission such as Throttle Position, Engine 173