Athearn RTR GP35 with new motor

[Catt]

Why did they remove the small radiator fan?

The removal of the small fan usually indicates a rebuild and quite often the removal of the turbo charger which derates the hp of the motor.Thedse (or so it seems) usually end up in the 2,000 hp range and are quite often called GP 38-3's.I think that the BNSF rebuilds were called GP39-3's.