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Date: 04/28/17 05:42
GP38AC
Author: Brakeman

Is there any physical difference between an GP38AC and GP38?

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Date: 04/28/17 06:56
Re: GP38AC
Author: mcdeo

I was curious too, so a quick internet search looks like there are one or two minor differences. I'd think more specific to when the unit was built and for which RR. My guess are just normal production changes in the early '70's before the -2 units came out.

https://en.wikipedia.org/wiki/EMD_GP38AC

http://www.jreb.org/ns/index.php?topic=3692.0

Mike ONeill
Parker, CO

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Date: 04/28/17 07:39
Re: GP38AC
Author: CPR_4000

The "AC" means it has an AR-10 alternator rather than a D-32 generator as on earlier 38's. The alternator produces AC power which is rectified to DC, while the generator makes DC.

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Date: 04/28/17 09:24
Re: GP38AC
Author: Entropy

The 645 engine will have starter motors with an AR-10 ; D-32 generator was the starter motor.

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Date: 04/28/17 09:26
Re: GP38AC
Author: Dilworth

fan spacing maybe

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Date: 05/05/17 19:04
Re: GP38AC
Author: IORY_fan

The honest answer to this question is that the external difference from a GP38 to GP38AC is the blower housing(bulge behind the conductors side of the cab) is ribbed on the GP38AC and smooth on the GP38.....


IORY_fan

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