I have only one more issue with my 2001 durango, 4BT, 47RE swap and that is to get overdrive. I have been thru just about everything but still missing something. I have the tone ring on front of motor, TPS sensor running off pump shaft. I had my transmission rebuild guy hook up his scanner and rode with me and it shows the command for 1-2 then 2-3 and shifts fine but it never commands a shift to 3-4. I have checked connections, power and grounds. The durango had the 45RE with a 5.9L originally. Is there something little I am missing thats too obvious that I overlooked? Thanks in advance.