Searched for my other post about this but couldn't find it. I thought I had this figured out but apparently I was wrong. It's a '02 car 4l60e in a rock crawler/ rock racer, when in 4x4 low range it shifts like crap, hangs on the rev limiter bad before each shift. It's costing us valuable seconds on the race track and I need to find a cure. I'm wondering if I need to have the 4 low input in the pcm like the trucks have, segment swap? Any ideas/help for a novice tuner? Scan is on the laptop at the shop, I'll post it up tomorrow.