Same frustrating problem for me with 12054 operating/unloading tracks----have 3 of them and with all three the uncouple works perfectly but the unload is something else!!!! I use for power a ZW and despite varying voltage to test the unload function it is extremely sporadic in working to unload cars if at all-----example is post-war milk cars---no matter even if I turn ZW voltage to full it still does not seem to get enough power to have car function to even unload cans---have tested many a car etc...frustrating to spend so much for the track and not have it work as it should and having this problem with all 3! In fact I am going to buy fastrack transition pieces and use in between them my reliable older post war uncouple/unload tracks which always work ----and supply plenty of power for unloading operations. Seems from other posts these tracks have a lot of problems with unloading functions. Guess for sure they don't make em like they use too! Thanks for prior posts as I know I am not alone.