Im new to the forum, hope Im posting in the right spot, my question is, if there is a rpm sensor located on the 7.3 PSD, where is it?, I have been having problems with a rebuilt transmission install, and one of the things I need to check/replace before they will look at replacing (what I think is a bad rebuilt) transmission, is the RPM sensor, I have already replaced the MLPS as requested, with little results, any help would be appreciated

Thanks

 

Welcome to FTE sparky. RPM usually refers to the engine. There are 2 sensors I know of on the auto tranny you may be looking for.

Turbine Shaft Speed (TSS) Sensor
The turbine shaft speed (TSS) sensor is a magnetic pickup that sends the powertrain control module (PCM) information on the rotation speed of the coast clutch drum. The turbine shaft speed (TSS) sensor is mounted externally on the top of the transmission case. The PCM uses the TSS sensor signals to help determine electronic pressure control (EPC) pressure, shift scheduling the torque converter clutch (TCC) operation.

Output Shaft Speed (OSS) Sensor
The output shaft speed (OSS) sensor is a magnetic pickup that provides transmission output shaft rotation speed information to the powertrain control module (PCM).
The output shaft speed (OSS) sensor is mounted externally on the top of the transmission extension housing. The PCM uses the OSS sensor signal to help determine electronic pressure control (EPC) pressure, shift scheduling and torque converter clutch (TCC) operation.

 

5/6/2023
FTE is so useful,
I have an Edge CTS-3 and one of the PIDs it will monitor is TSS rpm.

Searching for that, led me to this page.

 

The engine rpm is generated from the cam position sensor in the front cover passenger side maybe half way between the fan pulley and crank pulley. If you're looking for the Transmission speed sensors they are as previously posted.