GRJ, are the motors wired in parallel? I noticed that the rear motor was turning but I couldn't compare its speed to the front motor. I would've thought the one power truck should be able to move my train on level track, but perhaps not. I do know that the set had no trouble with my train when both trucks were pulling.
The repair tech mentioned that these units have twist-on trucks. I can imagine how that works but I've never worked on a modern-era Lionel diesel. Do the trucks literally twist off, twist on? I don't want to void my warranty by working on this myself, and I have read on this forum that Lionel is quick to void warranties if an owner opens up their loco.
I always look forward to reading your posts, and I value your input on this.
ES44AC, yeah. I was thinking a while ago that if EMD had this many problems with their locomotives, Alco and the other minority builders may have won the war!