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07-15-2012 #1
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T56 speedo to Racepak dash question
On the Reacepak wiring diagram is shows the speedo has only one wire going to the dash. But on the T56 i have a VSS + and a VSS - coming out of the tranny. Also is the T56 speedo sender a Hall effect or Sine wave style?
1972 Nova Ridetech, Forgeline, Falken Tires, Wilwood, Bowler Performance Transmission, Lingenfelter Performance Engineering.
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07-20-2012 #2
Starting The Transformation
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Typical GM T56 VSS generator outputs an AC signal, so there is no + or - polarity. GM PCM does output a reference signal to the VSS to the + terminal, but otherwise for aftermarket speedo hookups follow their insructions.
Originally Posted by Bad94
John
07-20-2012 #3
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Racepak told me to hook one wire to the + port on the dash and other to - port. And they said the T56 is a Sine wave. Originally Posted by TD509EFI
1972 Nova Ridetech, Forgeline, Falken Tires, Wilwood, Bowler Performance Transmission, Lingenfelter Performance Engineering.
07-21-2012 #4
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On the Reacepak wiring diagram is shows the speedo has only one wire going to the dash
Bad94,
You only mentioned one wire in your post. AC signal is generally considered a symmetrical sine wave.
John
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