ATSG FORD 4R100 Manual page 9

Turbine Shaft Speed Sensor
The Turbine Shaft Speed (TSS) sensor is a magnetic
pickup that sends the PCM a frequency signal related
to the rotating speed of the transmission input shaft.
The TSS mounts on the top front of the case on some
models, as shown in Figure 9. We have also provided
you with the resistance readings and OEM part
numbers on both Turbine Speed Sensors, as the PTO
and Non-PTO models use different sensors, as shown
in Figure 9.
The PCM uses the TSS sensor signal to control EPC
pressure and TCC strategy.
Turbine Shaft Speed Sensor
PTO Models Only = 496-1244 Ohms Resistance
Part Number F81Z-7M101-BA
Non PTO Models Only = 781-1979 Ohms Resistance
Part Number F81Z-7M101-AA
Figure 9
Output Shaft Speed Sensor
All Models = 781-1979 Ohms Resistance
Part Number F81Z-7M101-AA
Figure 10
Technical Service Information
Copyright © 2003 ATSG
Copyright © 2003 ATSG
AUTOMATIC TRANSMISSION SERVICE GROUP
Output Shaft Speed Sensor
The Output Shaft Speed (OSS) sensor is a magnetic
pickup that sends the PCM a frequency signal related
to the rotating speed of the transmission output shaft.
The OSS sensor was added to the top of extension
housing, as shown in Figure 10. The OSS is triggered
by an added rotor pressed onto the output shaft. The
park gear is also now pressed onto the output shaft,
and the number 13 thrust washer has changed to a
thrust bearing, as shown in Figure 11. We have
provided you with the resistance reading and the
OEM part number for the output shaft speed sensor.
Refer to Figure 10 for output shaft speed sensor
information.
The PCM uses the OSS sensor signal to control EPC
pressure, shift scheduling and TCC strategy.
The Park Gear is also a press fit to the output
shaft, and the number 13 thrust washer, between
the case and the park gear has been replaced
with a needle bearing.
OSS Rotor
(Press Fit)
Figure 11
Park Gear
(Press Fit)
Copyright © 2003 ATSG
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