Daz Posted April 30, 2012 Share Posted April 30, 2012 I plan on using a T56(I don't have yet)for my GM 4.8L Turbo swap and I was wondering do I have to use electric Speedo gauge or can I use a mechanical ? Quote Link to comment Share on other sites More sharing options...
Mike kZ Posted April 30, 2012 Share Posted April 30, 2012 You need one of these: http://www.autometer.com/cat_gaugedetail.aspx?gid=2632&sid=7 Quote Link to comment Share on other sites More sharing options...
cheesepocket Posted April 30, 2012 Share Posted April 30, 2012 I agree, I used the black face version (Pro Comp I think) and it was so easy to set up. Then when I changed out tires and wheels I could simply re-calibrate from the driver's seat using the procedure on Auto-Meter's website. I tapped into the sine-wave VSS signal going from the T56 to the PCM connector. Color depends on the year harness. Mine is a '98 and it was violet. Quote Link to comment Share on other sites More sharing options...
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