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I have a 1995 ford explorer 4x4 . the overdrive light is off light flashes , i have replaced the switch in the end of gear shift lever but light still flashes saying it is not in overdrive ,, where do look next at
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Transmission Control Switch (TCS)
The transmission control switch (TCS) is a momentary contact switch that allows the driver to cancel operation of 5th (overdrive) gear.
The TCS is located on the end of the selector lever.
When the driver initially presses the TCS a signal is sent to the powertrain control module (PCM).
The PCM uses the shift solenoids to disengage/disable 5th gear operation and activate the coast clutch.
At the same time the PCM illuminates the transmission control indicator lamp (TCIL), to notify the driver that 5th gear is canceled.
When the TCS is pressed again, 5th gear operation is enabled, the coast clutch is released and the TCIL is turned off.
Whenever the ignition is cycled (vehicle shut off then started again) the TCS is turned off and 5th gear will be enabled, even if the TCS had been on when the ignition was shut off. Transmission Control Indicator Lamp (TCIL)
The transmission control indicator lamp (TCIL) is located in the instrument panel and is labeled O/D OFF. It is illuminated in conjunction with the transmission switch (TCS).
The TCIL will flash if the EPC solenoid circuit is shorted or a fault has been detected in a monitored sensor used for transmission operation.
Powertrain Control Module (PCM)
The operation of the transmission is controlled by the powertrain control module (PCM). Many input sensors provide information to the PCM. The PCM then controls actuators which determine transmission operation.
I think this is an electronic trans with no modulator. Overdrive is really not a gear but rather torque converter lockup. Torque converter may have completely failed.
There is an overdrive bypass switch on the end of the shift lever on some, Push the button on the end of the shifter. It is easy to overlook, as it is on the very end of the shift lever, and can be inadvertently switched off when you shift to park. Hope this solves your problem
the light is flashing to alert you to the fact that a fault has been detected in the transmission, the most common is excessive slippage detected by the torque speed sensor as compared to the outshaft shaft speed sensor, U will need to have the system tested for the stored trouble code that is set when this OD light blinks.
the OD light flashing indicates that the transmission control module has observed a fault. Take the car to a local aftermarket parts place and get the codes pulled (typically free) this will send you in the right direction regarding a repair.
this could mean there is a problem with the transmission,but most times when OD light is flashing it is because the wiring to the OD switch is broken.
is the OD switch on the end of the gear shift lever ?
or does your vehicle have the shifter on console between seats ?
1995 F150 Crew Cab 4x4 with automatic transmission kicks in and of gear, Have to mess with it to get it to go back into gear.
transmission does not slip at all. Can drive it for awhile and then it does it again. Can you help?
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