Since I am having problems with this myself, I will not start a ner page, but rather comment on my problems on this one.
The other day, I went to HSC and got in a K4 I had planted. I had another behind it so I could coupla and have an off chuffing sound for a doubleheadder. I coupled up, then applied throttle. The wheels beganto turn, then I sanded, applied more throttle, then it says wheelslip, but the lead loco's whels locked up. It stopped when I decreased throttle, but it makes no sense. The K4 used to have the best wheelslip, spinning wildly out of control, but now it locks up (It still moves forward though)
The weather was the Durango SIlverton heavy snow in winter.
I had this same issue with the Big Boy (with the performance upgrade) and it made me mad. Just the other day, I left Laramie on Sherman with a heavy freight in the same weather. Wheelslip galore, and managed to get 45 mph on track 1. It was a slower start, but I like the different engines to slip and have the drivers on oposite rotation cycles (1 up 1 down) I need the wheelslip to do this, but it would no longer work...
There was an update of some kind yesterday that downloaded, so I don't know what's up...
Any help would be appreciated. Thanks!