GP40 No. 3077

As of December 1988

This photo shows No. 3077 leading the eastbound Railblazer on 12/24/1988.   UPDATE: I found the negative, and this image is a fresh scan (better color, higher resolution).

Rio Grande's GP40s came in several groups, as shown in this table.

Number Range Date Purchased Comments
3051 - 3063 Jan 1966 Demoted to B-unit status, 1972
3064 - 3068 Sept 1966 Demoted to B-unit status, 1972
3069 - 3080 Feb 1967 3069-3075 demoted to B-unit status, 1972
3081 - 3085 Oct 1969 Delivered in Billboard "Rio Grande" lettering
3086 - 3093 Nov 1971 Delivered in Billboard "Rio Grande" lettering
3131 - 3153 1983 Purchased second-hand from Conrail. Had temporary unit numbers until repainted 1984-1985.

Specific information for individual units may be found on the Rio Grande Modeling & Historical Society's GP40 page.

 (1) Mars Light on low nose

(2) Replacement air horn-- looks like a Leslie instead of the Nathan M3 air horn

(3) Sinclair antenna

(4) Extra roof vent

(5) Cab sunshade


  • GP40s of this class were all delivered with the Mars signal light.  Some were later replaced with Pyle lights as maintenance required it, since Mars later went out of production.
  • Rio Grande locomotives delivered before 1980 came with the Nathan M3 air horn.  The bells on the Leslie are longer.
  • Most earlier GP40s had an additional engine room vent added by the railroad after delivery, forward of the dynamic brake fan.  It's blurry in this photo, but it's there.
  • GP40 Nos. 3051 through 3075 were downgraded to "B" unit status in 1972.  When that happened, most cab amenities such as sunshades were removed.  No. 3077 was not one of these.  Some units were upgraded back to lead unit status, and a few did not receive shades at that time. 
  • Note the lifting rings (eyebolts) on the roof.



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