Hello, I have a question about my new transmission (among other things) in my vette. The car seems to hold in gears 1,2 & 3 longer than they should. When I get it up to speed, say 50, and let off the throttle it will go into overdrive. As soon as the throttle is pressed it comes out of OD. When driving at freeway speeds the car seems to hunt between 3 & 4. The shop has replaced the TV cable and tried different adjustments. They say that all they can do is make the shift softer. Does anyone know what gives? Like I said, the tranny is new. The car has also generated a code 21 with a rough idle when 1st started a few times. I shut it off and started it and the rough idle goes away. My mechanic has tried to contact the tranny builder to ask him about it but he went to Italy yesterday. I just want to drive the car again someday.