I'm having a problem with a 1999 Silverado converted to gen IV with TBSS ECU. Motor is a 6.0 with a SC. As soon as you start to move the transmission shifts second third forth by the time i reach 25 mph. Nothing i have seem to change makes any difference. I'm sure its something stupid.
Tune is very earlier, i have just started attempting to MAF tune.
Thanks in advance.
Restart 07052017.1.hpt2009 tbss.Layout.xml1999 silverado gen iv 07052017 MAF.1.hpl