(Sorry about the motion blur! It was rather dim that day)
(2) Nathan M3 air horn
(3) Union Pacific - style ditch lights
(4) Dash-2 style extended-range dynamic brake blister
(5) Ditch lights on rear of unit (shown here on No. 3097)
- 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.
- Units upgraded post-UP-merger (1996) have this style of light, which is mounted below the deck on the pilot and is not painted to match the unit. Ditch lights installed during the SP era are on brackets that extend above the deck.
- Compare the dynamic brake blister to that on GP40 No. 3077, which does not extend as far forward. This style was inaugurated with the dash-2 series around 1972.
- Under Union Pacific, units assigned primarily to local service usually have ditch lights mounted front and back, since they sometimes end up running long-end forward.