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Locomotive Phases and Rosters - EMD/IC GP8

The GP8 is an Illinois Central rebuild of older GP7 and GP9 units. The phases below are for the GP8 rebuilds themselves and do not reflect the phases of the original locomotives prior to rebuilding. IC GP10 rebuilds followed similar phases, except with no Phase 4a; see GP10 Phases.

According to the roster at illnois-central.net, all units I've labelled as Phase 1a and 1b (and one Phase 2 unit, IC 7974) are classfied as GP7, though they bear many of the spotting features of later GP8 units.

These phases are of my own making.

Phases

Phase 1a: 1967-1968 (GP7)

The first few units rebuilt in 1967-1968 had inconsistent spotting features. All lack the central air intake of later units, and a couple still had a high short hood.

Phase 1b: 1968-1969 (GP7)

These units were very similar to Phase 2 units, except they had a cab-mounted headlight.

Phase 2: 1969-1971

Phase 3a: 1971-1977

Phase 3b: 1977

Phase 3c: 1977-1978

Phase 4a: 1977

Phase 4b: 1977-1978

Other details

IC GP8's were not rebuilt in order based on their roadnumber, although some units - all numbered after IC 7850 - were rebuilt from corresponding 8000-series units (ie. 8901 became 7901 and so on).

Lights and air filters

Frame and hood

Misc. details

Roster

The following illustrates the phases of GP8 production for units with IC numbers. Notes about the roster:

Rebuild dates are courtesy of the roster at illnois-central.net.

Sort by: Number - Phase

IC NumberRebuiltPhaseModelFrameHoodNotes
770019743a9L
770119753a7E
770219743a9L
770319743a7L
770419743a9E
770519743a?7L?
770619743a7E
770719743a7L
770819743a7E
770919743a7L
771019753a9E
771119743a7E
771219743b9E
771319743a7L
771419743a7LGP9 hood louvers
771519743a9E
771619743a?7E?
771719743a7E
771819743a7E
771919753a7E
772019773a7E
772119773a7E
772219773a7E
772319753a7L
772419763a9L
772519753a9E
772619773a7E
772719773a7L(2)
772819773a7E(2)
772919763a7E
773019773a7L(2)
773119773a7L
773219763a7E
773319753a9L
773419773b7L
773519753a7E
773619753a7E
77371975?7Rebuilt to GP11
773819753a7E
773919753a9E
774019753a7E
774119753a9E
774219753a9L
774319763a7L
774419763a7L
774519763a7L
774619773c7E
77721977?
77731975?
780019774b9L
785019733a7E
785119693aGP107E
785219733a9E
790019773a7E
790119723a7L
790219753a7L
790319773b7E
790419723a7E
790519723a7E
790619773a7E(2)
790719753a9L
790819774b7E
790919713a7L
791019773c7E
791119774a7L
791219774b7E
791319773c7L
791419774b7L
791519784b7E
791619783c7E
791719784b7E
791819784b7E
7950196927E
795219753a7E
795319733a9E
795419774a7E
79551972?27E
795719691bGP77E
796019671aGP77Ehigh short hood
796119681aGP77Ehigh short hood
796219743a7E
796319773b7L
796419681aGP77E48" fans, (1)
796519773c7L
796619681bGP77E48" fans, (1)
796719773b9L
796819691bGP77L(1)
796919691bGP77L(1)
797019733a?9
797119681aGP77L(1)
7972196927L(1)
797419692GP77L(1)
7976196927L(1)
7978197127L(1)
7979196927L(1)
798119681bGP77L48" fans, (1)
798219723aGP77ETo IC 7900
798319723aGP107E(1)
798419723aGP107E
798519723aGP107E(1)
798619733a9E
798719733a9E
798819733a9E
798919723a7E
799019723a7EAdditional hood louvers
799119723a7L
799219723a7L(1)
799319723a7LAdditional hood louvers
799419733a7E
799519733a9E
799619733a9L
799719733a9L
799819733a9E
799919733a9L
 Copyright © Michael Eby - Page code last updated 2016-02-15