well I just installed a Autometer electronic speedometer and gauges in my 56. and when I drove it to calibrate it the tranny wouldnt shift out of 2nd gear,so I drove it 2 miles to finish the the calibration. Now it will shift but acts like the shifts are very hard and when I stop it acts like it is trying to kill the engine.I am running the ecm out of a 2004 escalade and used pin 21 on the green connector for my vss signal. Has anybody had this problem? thanks