mickoo
Western Thunderer
No resistor banks in there mate , that big grill each side is the clean air intake for the engine supply and traction motor blowers.This one also has the CN snow hoods over the resistance air intakes next to the cab.
None of those Geeps have dynamic brake grids, only the SD70 and 75I have dynamic brake grids.
The move from blistered dynamic brake grids mid engine to brake grids behind the cab came with the SD50 and onward models, all GP models retained mid hood blisters for dynamic brakes, no blisters, no dynamic brake resistor banks.
SP did the same (intake covers) with some of it's geeps assigned to snow clearance over Donner and some ATSF geeps had them, but not for snow. ATSF was for sucking in colder air lower down like SD45 elephant ears, those engines also had exhaust stack fences to stop hot exhaust being curled down over the body and into the clean air intake.
Stack fences were more common than intake shields, you can find fences and no shields but rare to find shields without fences. SD45 and GP35 were certainly two classes with them, there may be others.
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