speed sensor vp auto v6 and computer in vs

[sprattzvx]

hey guys. quick question, a mate has a vp engine and box running in a vs commy but no speedo. i know the ecotec sends the signal into the pcm and then on to the dash. so basically i need to know what the pcm modifies to work the vs dash. if the vp auto speed sensor out put is the same as the vs 4l60e then i assume i can just wire the output straight to the dash. wishfull thinking obviously the speed sensor signal goes through the pcm for a reason ie modifying the voltage in someway. most of the wiring diagrams around are hard to read in detail due to low res.
thanks.

[Jayme]

The vp gearbox sensor sends the correct signal straight up to go to the vs dash (square wave). Beware some vp wiring jobs put the vp divide by 5 circuit in the speedo wire somewhere. All you need to do is wire the signal from the sensor directly to the vs dash speedo wire. The ecotec uses a different gbox sensor which has a sinewave output. The pcm needs to convert it to square wave then send to the dash.

[sprattzvx]

ahh sweet mate. was hoping i could just feed straight to the dash.