Remove the air cleaner assembly.
Disconnect the output shaft (countershaft) speed sensor connector, and remove the output shaft (countershaft) speed sensor (A).

Install a new O-ring (B) on the new output shaft (countershaft) speed sensor, then install the output shaft (countershaft) speed sensor.
Check the connector for rust, dirt, or oil, then connect the connector securely.
Install the air cleaner assembly.
Output Shaft (Countershaft) Speed Sensor Replacement (M/T)
M/T
Raise the vehicle on a lift.
Disconnect the output shaft (countershaft) speed sensor connector (A).
Remove the output shaft (countershaft) speed sensor (B).
...
ATF Replacement (A/T)
NOTE: Keep all foreign particles out of the transmission.
Warm up the engine to normal operating temperature (the radiator fan
comes on), and turn the engine off.
Raise the vehic ...