Wont stay in overdrive

Since the Lumina APV van is the same as mine I thought I would cross post this here. Please see this thread and let me know your ideas. Thanks X


http://www.automotiveforums.com/vbulletin/showthread.php?t=979318

...replied in the Silhouette forum but this info is relevant of Transport/APV/ Siljhouette but I will monitor Silhouette and continue replying there only to respect forum rules against duplication of threads.