gibby38

My Son has a 2000 civic ex with an auto trans. Last week he slid of the road in bad weather. Long story short he broadsided a road sign post and slid over the top of it. the sign got caught up under the car. It tore off the entire exaust system and broke the shift cable. I replaced everything from the exhaust mainifold back including the cat and o2 sensors, and the shift cable. the car runs ok but the d-4 light on the dash is blinking, the car acts like its in drive 4 all the time, it wont downshift or upshift at all unless its done manually with the shifter. also the speedo doesnt work now. any help would be appreciated.