2007 nvl 670 volvo down shifting delay

Hello, I own a 2007 nvl 670 volvo truck with a ten speed ultrashift transmission. my problem is that when I am driving my truck past the 3rd speed and when I try to to stop at a light or when I am on heavy traffic, my transmission has a delay of at least 1 or 3 seconds when down shifting from 3rd to 2nd gear. When I push the brake and make a full stop the transmission engages the 2nd gear with no problems. The problem only happens when the truck still on motion, of at least 1mph. I when to Dallas, TX and Livonia, MI volvo and they changed the harness wiring, the 3 speed sensors, the xy-shifter, and the clutch. I don't know where else to go to have this problem resolved. Please help.

 

Finally got the problem solved, It was the COAST MODE parameter that needed to be reprogramed. Before it was programmed to start coasting from the 5th gear and for some reason it lost the programming to the 3rd gear, I bought myself a nexiq programmer and used my brother's truck as reference. I looked at parameter's settings and put them exactly in my truck's ECM.