Speedometer pick-up from G50-05 transaxle

I have a GM V-8 engine (Generation III, LS1) that will be connected to my 1993 G50-05 transaxle (inverted).

The engine's computer (PCM) recieves an electrical signal from the transmission, and then sends another electrical signal to the speedometer (and is meant to work with other GM transmissions).

Does anyone know what the electrical signal is from the Porsche transaxle?

I need to know the voltage of the signal, and the "pulses per driveshaft revolution" of the transaxle.

Thanks in advance for your help.

Chris
 
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