hello everyone..i havea 95 millenia swith 140000 mles on it. i recently have experianced some transmission issues,it seems that it skips second gear and wont try to shift to 4th it redlins doing 80..and makes no indication that it is trying to shift again.it is showng 2 codes p1000 and p1601.. any sggestion of what todo? i just tok thebatt. out and the air flter box to inspect the trany sensors and plugs. all of he wires look ok..

 

also, can someone tell me where the tcu is located..