Athearn Genesis G75827 HO Scale SD70 Norfolk Southern NS 2566 DCC Sound Paint Rack Hard anodized pivot balls throughout:

Hard anodized pivot balls throughout: links

If you look closely

Team Associated 42059 Factory Team 30T Machined Steel Ring Gear for Enduro

which is directional for added performance and stability

Athearn Genesis G75827 HO Scale SD70 Norfolk Southern NS 2566 DCC Sound Paint Rack Hard anodized pivot balls throughout:Athearn Genesis G75827 HO Scale SD70 Norfolk Southern NS 2566 DCC Sound Continuing upon the successful SD60 series, in 1992 EMD debuted the next step in locomotive evolution with the SD70 series. While outwardly similar at first glance to the SD60M, the D. C. drive SD70M featured several external design refinements from the predecessor model. Battery boxes were relocated to the left hand side walkway immediately behind the cab, a large, boxy forward