For my project using a 97 1500 2wd driveline, i am planning on using the speedometer driven gear in the transmission to drive a cable for my mechanical speedometer.

My question is; does the pcm use the speed reading for anything other than an output for the speedometer?
By removing the wiring all together will it cause driveablitly or running issues?

I cant have both the speed sensor plugged in and a cable hooked up so I need to know before I remove the wiring foe that plug altogether

 

The 97 will be a 47RE, that means the governor is electronic, not mechanical. PCM needs speed sensor input to control governor pressure.....

What are you putting the drivetrain in?

 

Drivetrain is going in a 51 ratrod project I am finally getting back at. I did update my thread in the non/tech section and bring it back to the top.

Is the pcm getting goveenor speed from the speed sensor signal or the output speed shaft signal?

The rear axle also has the tone ring sensor in the rear axle. Is this going to be strictly for abs control on a 97?

 

You could use something like this: https://www.summitracing.com/parts/sum-g2887-1

 

That, I think, is going to be the hot ticket.

 

I was just looking at those. Is it going to give me the proper signal for the pcm? What signal does the factory pcm need to see?

Looking at the factory wiring it's got a hot feed into the sensor, (not sure if 5 or 12 volts) then its got the return signal. This part is only 2 wire

 

5 volts I think. Should tell in the service manual how many pulses per revolution.

 

Yes, service manual says 5 volt signal and 8 pulse per revolution. I’m having a difficult time though finding a 3 wire, 8 pulse adapter. I’ll have to make a few calls tomorrow and see what I can come up with.

 

You don't happeb to know if the pcm is capable of reading both square waves AND sine waves do you? All 8 revolution adapters are sine wave outputs vs our factory ones which are square wave.

Dakota digital does have a converter to convert the sine wave to square if i need it.

 

Only 2001-2002 can read sine waves if properly tuned.