It started yesterday and never payed it any attention until today. Thought that it was because trans was cold and it was a short trip, but today I let the truck come up to temperature before driving off, and all day long the Torgue converter never went into lock up. Before it would go into lock up above 45MPH or there about. But now it does nothing.
What do I need to log to find out if it is the converter that has the problem? From what I have read, there are several things that can cause it to lock up, so give me some help here if you can. Is there a way to force it into lock up while driving using HP Tuners?
Thanks for any feedback at this point.