98 sable transmission trouble

[caroll8]

Hi. My 98 sable transmission was working fine;had no prior trouble and had changed fluid and filter regularly.Came home one night everything working fine and cranked the next day and put it in gear and it will not budge.Any help would be appreciated.I don't want to buy a new transmission unless I need one.It has an ax4n transmission.

Thanks caroll8

[DistanceGuy1]

SES light on? Able to get any Codes?

[caroll8]

Haven't been able to get the man to use the code reader on it yet.He has been sick but hope to soon.SES light is on but has been on for a while.

[DistanceGuy1]

I copied the below from a Motorcraft site. It will give you an idea of what MIGHT be wrong once your codes are pulled. PCM = Power Control Module


AX4S/AX4N (FWD) Transmission
(has turbine speed sensor)

Transmission Inputs
The Digital Transmission Range (DTR) sensor provides a single analog and three digital inputs to the PCM. The
PCM decodes the inputs to determine the driver-selected gear position (Park, Rev, Neutral, OD, D, 1). This input
device is checked for opens and invalid input patterns. (P0708 P0705)

The Vehicle Speed Sensor (VSS), Turbine Shaft Speed (TSS) sensor and Output Shaft Speed (OSS) sensor, if
equipped, are analog inputs that are checked for rationality. If the engine rpm is above the torque converter stall speed and engine load is high, it can be inferred that the vehicle must be moving. If there is insufficient output from the VSS sensor, a malfunction is indicated (P0500). If there is insufficient output from the TSS sensor, a
malfunction is indicated (P0715). If there is insufficient output from the OSS sensor, a malfunction is indicated
(P0720).

Transmission Outputs
Shift Solenoids
The Shift Solenoid (SSA SSB and SSC) output circuits are checked for opens and shorts by the PCM by
monitoring the status of a feedback circuit from the output driver (P0750 SSA, P0755 SSB, P0760 SSC).
All vehicle applications will utilize an inductive signature circuit to monitor the shift solenoids functionally. The ISIG
circuit monitors the current signature of the shift solenoid as the solenoid is commanded on. A solenoid that
functions properly will show a characteristic decrease in current as the solenoid starts to move. If the solenoid is
malfunctioning, the current will not change (P1714 SSA, P1715 SSB, P1716 SSC). The ISIG test runs in
conjunction with the other transmission functional tests. The lack of communication between the ISIG chip and the
PCM microprocessor is also monitored (P1636).

Torque Converter Clutch
The Torque Converter Clutch (TCC) output circuit is a duty-cycled output that is checked electrically for opens and
shorts by the PCM by monitoring the status of a feedback circuit from the output driver (P0743).
All vehicle applications will utilize an inductive signature circuit to monitor the torque converter clutch. The ISIG
circuit monitors the current signature of the TCC solenoid as the solenoid is commanded on. A solenoid that
functions properly will show a characteristic decrease in current as the solenoid starts to move. If the solenoid is
malfunctioning, the current will not change (P1740). The ISIG test runs in conjunction with the other transmission
functional tests. The lack of communication between the ISIG chip and the PCM microprocessor is also monitored
(P1636).

Electronic Pressure Control
The EPC solenoid is a variable force solenoid that controls line pressure in the transmission. The EPC solenoid
has a feedback circuit in the PCM that monitors EPC current. If the current indicates a short to ground (low
pressure), engine torque may be reduced to prevent damage to the transmission. (P1747, PCA)

[caroll8]

Thanks for your help.