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tbone 01-31-2005, 09:27 PM Today after 144k my Allison trans started shifting in and out of gear. SES light came on the indicator light on the dash went out when shifting from drive to park. Reprogramed the computer seemed to be allright in stock mode . Has anyone had this type of problem, also the automatis door lock went out also. Mackin 01-31-2005, 09:51 PM Best place to start,I would have it scanned for the TCM/ECM codes,otherwise your just guessing. stotts 02-02-2005, 01:07 PM Symptoms sounds similar to when my NSBU (Nuetral Safety Back-Up) switch went out. Search for "NSBU" in the discussion threads and see if the descriptions people list are similar to yours. | ||