1999 4.8l and 4l60e
A few weeks ago I had to repair the vss wiring but since then the pcm will not enable 4th gear or tcc.
I can manually actuate them with the scanner.
I have no codes stored and have also tried a reflash.
There must be a parameter the pcm is looking for but I just cant seem to find it.
All appears well in the datastream but just looking for a couple ideas to check.
thanks
