My consolidation 2-8-0 spins the wheels on about a 3 degree  or 2 1/2 rise 36-38 in length with 3 pax cars or 6 freight. I want to use it on the pax. I put Bullfrog Snot on the wheels and it didn't help. Track is straight and smooth. one track connector but is smooth also.  Any suggestions?
I may replace it with another steamer. Does anyone have a good suggestion on one the will work with this load? The big diesels I have have no problem with the climb.