GB Railfreight modifying 12 Class 66s loco’s Freight operator GB Railfreight (GBRf) is modifying 12 of its Class 66s with different gear ratios to enable them to increase their power output. Freight operator GB Railfreight (GBRf) is modifying 12 of its Class 66s with different gear ratios to enable them to increase their power output.

GB Railfreight modifying 12 Class 66s loco’s www.railadvent.co.uk/2025/06/gb-railfreight-m... #class_66 #GbRailfreight #no_66779