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245
Driving Your Explorer
*
[DR00350(ALL)06/95]
Procedures for driving your vehicle will vary depending on
which type of transmission your vehicle has.
*
[DR00600(ALL)06/95]
■ a manual transmission
[DR05475( X)12/95]
■ an Automatic Overdrive Transmission 4R55E or 4R70W
[DR05700(ALL)1/96] Automatic Transmission Operation
4R44E/4R55E/4R70W
*
[DR08715(ALL)12/95]
The 4R44E, 4R55E and 4R70W transmissions are electronically
controlled four speed overdrive automatic transmissions with
lockup torque converter. Transmission operation is controlled by
the Powertrain Control Module (PCM).
*
[DR08720(ALL)08/95]
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 speed,
vehicle speed and transmission temperature are used by the
PCM to shift the transmission into a higher or lower gear when
required for the best performance and fuel economy. For
example, you may notice that the transmission will upshift to a
higher gear more quickly when the vehicle has not reached
normal operating temperature.
*
[DR08730(ALL)08/95]
The PCM also controls the transmission’s Torque Converter
Clutch (TCC) to further raise vehicle performance and fuel
economy. The TCC will engage when the transmission operating
temperature and other conditions determined by the PCM have
been met. Engagement of the clutch may be noted as a decrease
in engine speed.
[DR08740(ALL)03/95]
To help in troubleshooting, the PCM continually performs
self-tests on the electronic control system and, if any faults are
detected, stores them in memory. The Overdrive Off Indicator
Light (O/D OFF), which is located on the instrument cluster,
may flash steadily if a malfunction has been detected. If the
File:10undrx.ex
Update:Thu Feb 29 09:12:36 1996
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