at first, I would be driving along and the speedometer would drop to zero. Than the idiot light right beneath would come on, saying check transmission. Speedometer would work again and alarm would go away. Now , the idiot light to the left of the wheel comes on, blinking and I have been told that throws the transmission into "default" and I must drive in manual. I had a transmission put in and it continues to do this? Any ideas/input? I have already had an alternator and regulator put in prior to the transmission....... Please help............