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EMD "GP35" Locomotives

Last revised: September 20, 2023

By: Adam Burns

The GP35 was EMD's final four-axle road-switcher equipped with its rugged 567 prime mover.  The model also established a new carbody design, which became the builder's standard through the late 1980s.

By the 1960s the market reemerged for new diesels as railroads looked to replace aging first-generation variants like the FT, F3, F7 and early General Purpose/Special Duty models.

General Electric recognized this and, along with American Locomotive's declining reputation, released its own road-switcher, the U25B in 1959.

The GP35 offered several upgrades over the earlier GP30, including greater horsepower, and sold more than 1,300 examples between 1963-1965.

Today, numerous GP35s remain in service on regional and shortlines as well as a handful which are already preserved.

Photos

682838270871jg1u079.jpgPennsylvania GP35 #2275 and GP30 #2215 lead a freight near Detroit, Michigan in January, 1966. American-Rails.com collection.

Overview

In his book, "Vintage Diesel Locomotives," author Mike Schafer notes the GP35 introduced Electro-Motive's "35 Line," which also included the companion six-axle SD35.

The GP30 was the transition model during this period; built between 1961-1963 it featured many of the same carbody characteristics as its successor, such as the pointed low nose.

However, the GP35 did away with the streamlined "bulge" along the roofline between the cab and dynamic brake blister.  It also featured some other exterior and interior improvements which will be discussed in greater detail below.

The GP35 debuted in 1963 and sequentially followed the GP30.  It sported the final version of the 567 engine block, the turbocharged 567D3A.  This last variant again saw a slight increase in horsepower, bumping output to 2,500.

Four examples of Santa Fe's rebuild fleet, including a pair of GP35u's and CF7's, are seen here at Cleburne, Texas in September, 1982. The upgraded GP35's featured Vapor cab air conditioners and smoke deflectors over the central air intake grills while the CF7's were overhauled from former F units. Mike Bledsoe photo. American-Rails.com collection.

In the 20+ years since Electro-Motive first introduced the 567 in the groundbreaking FT of 1939, the engine had gone through a number of advancements.  In doing so, EMD had nearly double its horsepower output from 1,350 in the FT to 2,500 in the GP35.

EMD introduced further internal improvements in the GP35, which further changed the carbody appearance.  In his book, "Diesel Locomotives: Cyclopedia, Volume 2," author Bob Hayden points out the model featured a redesigned centralized air intake system and electrical cabinet.

These new features took up less space and no longer required the streamlined "bulge" over the cab that defined the earlier GP30.  The GP35's clean roofline, and overall uniform body, became the classic look on all new EMD models for the next 30 years.

20860293872y421kj1oi0297029709889.jpgA pair of just-delivered Toledo, Peoria & Western GP35's pose on the turntable at Peoria, Illinois on November 12, 1965. American-Rails.com collection.

Spotting Features

The GP35's most noticeable characteristic was the new Spartan Cab.   It sported a pointed, low nose similar to that of the GP30.  However, unlike its predecessor, the Spartan featured angular eaves that were flush with the roofline in place of the GP30's beveled look.

Other notable traits included two large rear radiator fans with a smaller one between them.  EMD also cataloged the non-turbocharged and less powerful GP28.  This 1,800 horsepower variant featured two larger radiator fans and two standard exhaust stacks.

In his book, "A Field Guide To Trains," author Gerald Foster notes the GP35 also featured the rectangular turbocharger stack, blower duct along the left walkway, and standard Blomberg trucks.

Erie Lackawanna GP35 #2561 at Akron, Ohio. Date not recorded. American-Rails.com collection.

The Southern and Norfolk & Western continued to request high, short hood variants, which were also purchased by Ferrocarriles Nacionales de México (NdeM).

Other variants included those sporting AAR Type Bs, requested by the Southern and the Ann Arbor from trade-in Alcos.  The use of these trucks on any EMD was always an interesting sight.

One final notable variant were those acquired by the Chicago & North Western and Frisco equipped with 3,000-gallon fuel tanks, which required the air reservoir tanks to be placed on the roof.  This units were often referred to as "Torpedo Boats."

Data Sheet and Specifications

Entered Production7/1963 (Demonstrator #5652)
Years Produced7/1963 - 12/1965
Engine567D3
Engine BuilderGM
Horsepower2500
RPM800
Cylinders16
Length56' 2"
Height (Top Of Rail To Top Of Cab)15' 3"
Width10' 2 ½"
Weight260,000 Lbs
Fuel Capacity1700 Gallons
Air CompressorGardner-Denver
Air Compressor ModelWBO
Air Brake ManufacturerWestinghouse
Air Brake Schedule24L
TrucksB-B
Truck TypeBlomberg
Truck Wheelbase9'
Wheel Size40"
Traction MotorsD57 (4), GM
Primary GeneratorD22, GM
Auxiliary GeneratorDelco (64-72)
AlternatorD14
MU (Multiple-Unit)Yes
Dynamic BrakesYes
Gear Ratio62:15
Tractive Effort (Starting)60,500 Lbs at 25%
Tractive Effort (Continuous)50,000 Lbs at 9.3 mph
Top Speed65 mph

Production Roster

Total Built = 1,334

Owner Road Number(s) Serial Number(s) Order Number Completion Date
Chicago, Burlington & Quincy 978-981 28300-28303 7668 12/1963
Electro-Motive (Demonstrator) 5652 (became Union Pacific #762) 28319 5652 7/1963
Electro-Motive (Demonstrator) 5654 (became Union Pacific #763) 28352 5652 8/1963
Western Pacific 3001-3010 28398-28407 7662 11/1963-12/1963
Great Northern 3017-3024 28433-28440 7698 3/1964
Great Northern 3025 28441 7722 3/1964
Gulf, Mobile & Ohio 601-609 28442-28450 7670 2/1964-3/1964
Southern Pacific 7408-7439 28462-28493 7695 12/1963-2/1964
St. Louis-San Francisco Railway (Frisco) 700 28525 7676 3/1964
Atlantic Coast Line 909-912 28535-28538 7677 10/1963
Atlantic Coast Line 913-914 28539-28540 7678 10/1963
Central of Georgia 210-214 28541-28545 7692 12/1963
Norfolk & Western 200-214 28615-28629 5657 11/1963-12/1963
Reading 6501-6506 28633-28638 7685 12/1963
Louisville & Nashville 1110 28654 7688 3/1964
Louisville & Nashville 1100-1109 28655-28664 5664 2/1965
Santa Fe 1300-1349 28697-28746 7675 1/1964-6/1964
Missouri Pacific (Texas & Pacific) 600-614 28772-28786 7694 12/1963-1/1964
Missouri Pacific 615-619 28787-28791 01/64 (7706) 1/1964
Detroit, Toledo & Ironton 350-353 28792-28795 7710 1/1964
Gulf, Mobile & Ohio 610 28846 7670 3/1964
Western Maryland 501-505 28849-28853 5660 11/1963
Southern Pacific 7440-7464 28867-28891 7695 2/1964-3/1964
St. Louis-Southwestern Railway (Frisco) 760-762 28892-28894 7703 1/1964
Electro-Motive (Demonstrator) 5661, (renumbered 1964, became New York Central #6155) 28906 5661 2/1964
St. Louis Southwestern Railway (Cotton Belt) 763 28907 7703 1/1964
Chicago & North Western 824-825 28908-28909 7704 2/1964
St. Louis-San Francisco Railway (Frisco) 701-716 28912-28927 7705 3/1964-4/1964
Missouri Pacific 620-624 28928-28932 7706 2/1964
Detroit, Toledo & Ironton 354-357 28953-28956 7710 1/1964-2/1964
Chicago & Eastern Illinois 242-244 28958-28960 7708 3/1964
Chicago & North Western 826-843 28961-28978 7709 3/1964-4/1964
Chicago, Burlington & Quincy 982-983 28979-28980 7711 3/1964
Chicago, Burlington & Quincy 986-991 28981-28986 7719 5/1964-7/1964
Chicago, Burlington & Quincy 996-999 28987-28990 7720 11/1964-12/1964
Ann Arbor 385-394 28991-29000 7712 3/1964-6/1964
Pennsylvania 2252-2275 29001-29024 7713 5/1964-6/1964
Western Pacific 3011 29030 7714 11/1964
Western Pacific 3012 29031 7770 11/1964
Baltimore & Ohio 3500-3519 29090-29109 7716 3/1964-4/1964
Chesapeake & Ohio 3520-3539 29110-29129 7717 4/1964-6/1964
New York Central 6125-6127 29130-29132 7718 12/1963
Reading 3626-3637 29134-29145 7721 8/1964
New York, Chicago & St Louis (Nickel Plate Road) 910 29167 7723 5/1964
Union Pacific 740-761 29168-29189 7724 5/1964-7/1964
Norfolk & Western 215-238 29215-29238 5665 3/1964-4/1964
Denver & Rio Grande Western 3029-3036 29260-29267 7727 5/1964-6/1964
Norfolk & Western 239 29269 5665 4/1964
Gulf, Mobile & Ohio 613-622 29270-29279 7729 8/1964
Chicago, Burlington & Quincy 984-985 29280-29281 7711 4/1964
Chicago, Burlington & Quincy 992-995 29282-29285 7719 8/1964-10/1964
Gulf, Mobile & Ohio 611-612 29299-29300 7670 4/1964
De Queen & Eastern D6 29359 5667 5/1964
Denver & Rio Grande Western 3037-3038 29370-29371 7735 6/1964
Baltimore & Ohio 3540-3559 29372-29391 7736 7/1964-9/1964
Chesapeake & Ohio 3560-3575 29392-29407 7737 9/1964-11/1964
Pennsylvania 2276-2283 29447-29454 7713 6/1964
Pennsylvania 2284-2296 29455-29467 7741 6/1964
Wabash 540-547 29468-29475 7742 4/1964
Louisville & Nashville 1111-1113 29476-29478 7743 5/1964
Soo Line 722 29479 7744 8/1964
Soo Line 723-725 29480-29482 7745 7/1964
Erie Lackawanna 2551 29485 7746 9/1964
Erie Lackawanna 2555-2562 29486-29493 7747 9/1964
Erie Lackawanna 2552-2554 29494-29496 7746 9/1964
Chicago & Eastern Illinois 250-254 29541-29545 5668 7/1964
Chicago & Eastern Illinois 245-249 29546-29550 7748 6/1964
Southern Pacific 7465-7484 29551-29570 5669 5/1964-6/1964
Reading 3638-3655 29571-29588 7721 8/1964-9/1964
Gulf, Mobile & Ohio 623-624 29589-29590 7729 9/1964
Alaska Railroad 2500 29592 7751 11/1964
Pennsylvania 2297-2308 29605-29616 7765 11/1964
Pennsylvania 2309-2310 29617-29618 7753 11/1964
Chicago & Eastern Illinois 255-264 29648-29657 7758 9/1964
Norfolk & Western 1302-1308 29658-29664 7760 11/1964
New York Central 6128-6129 29668-29669 7749 12/1964
New York Central 6130-6149 29670-29689 7791 12/1964-1/1965
Southern Pacific 7700-7727 29702-29729 7756 12/1964-2/1965
St. Louis Southwestern Railway (Cotton Belt) 764-771 29730-29737 5680 12/1964
St. Louis Southwestern Railway (Cotton Belt) 772-779 29738-29745 7762 2/1965-3/1965
Gulf, Mobile & Ohio 625-636 29746-29757 7764 1/1965-3/1965
Chicago & North Western 844-863 29760-29779 7763 2/1965-3/1965
Missouri Pacific 625-639 29805-29819 7767 1/1965-3/1965
Missouri Pacific (Texas & Pacific) 640-649 29820-29829 7781 3/1965-4/1965
Norfolk & Western 1300-1301 29859-29860 7768 11/1964
Louisville & Nashville 1114-1115 29863-29864 7769 11/1964
Alaska Railroad 2502 29870 7772 3/1965
Southern 2645-2702 29900-29957 7774 1/1965-4/1965
Southern 2703-2704 29958-29959 7775 2/1965
Denver & Rio Grande Western 3039-3048 29964-29973 7776 12/1964-1/1965
Denver & Rio Grande Western 3049 30022 7776 1/1965
Denver & Rio Grande Western 3050 30023 7782 1/1965
Rock Island 300-312 30029-30041 7783 4/1965-5/1965
Rock Island 313-314 30042-30043 7802 6/1965
Savannah & Atlanta (Southern) 2705-2715 30044-30054 7784 12/1964-1/1965
Alaska Railroad 2503 30055 7772 3/1965
St Louis-San Francisco Railway (Frisco) 717-724 30056-30063 7785 3/1965-5/1965
Santa Fe 1350-1384 30064-30098 7786 4/1965-6/1965
Santa Fe 1385-1399 30099-30113 7809 6/1965-7/1965
Great Northern 3026-3035 30114-30123 7787 4/1965
Great Northern 3036 30124 7813 4/1965
Great Northern 3037-3040 30125-30128 7814 4/1965
Soo Line 726-731 30129-30134 7788 5/1965
Southern Pacific 7728-7761 30135-30168 7789 4/1965-6/1965
St. Louis Southwestern Railway (Cotton Belt) 780-781 30169-30170 7835 7/1965
Southern Pacific 7762-7782 30171-30191 7808 7/1965-11/1965
Western Pacific 3013-3022 30217-30226 7790 3/1965-4/1965
Gulf, Mobile & Ohio 637-648 30264-30275 7794 8/1965-9/1965
Chicago & North Western 864-865 30276-30277 7763 3/1965
Norfolk & Western 1309-1328 30278-30297 5679 1/1965-3/1965
Rock Island 315-317 30300-30302 7802 6/1965
Rock Island 318-319 30303-30304 7803 6/1965
Milwaukee Road 360-371 30313-30324 7799 5/1965-6/1965
Pennsylvania 2311-2370 30328-30385 7793 1/1965-4/1965
Pennsylvania 2369-2370 30386-30387 7801 4/1965
Seaboard Air Line 535 30431 7800 6/1965
Reading 3656 30458 7806 5/1965
Chicago & Eastern Illinois 265-272 30491-30498 5687 6/1965
Richmond, Fredericksburg & Potomac 111-118 30503-30510 7810 8/1965
Santa Fe 1400-1442 30545-30588 7809 7/1965-10/1965
Santa Fe 1443-1449 30589-30594 7817 10/1965
Erie Lackawanna 2563-2586 30595-30618 7818 8/1965-9/1965
Chicago & North Western 866 30625 7823 6/1965
Seaboard Air Line 536-544 30629-30637 5689 6/1965
Rock Island 325-333 30647-30655 5692 7/1965-8/1965
Rock Island 320-324 30690-30694 7826 7/1965
New York Central 6150-6154 30791-30795 7834 8/1965
Santa Fe 1450-1460 30926-30936 7829 10/1965-11/1965
Chesapeake & Ohio 3045, 3047 30987-30988 7839 9/1965
Chesapeake & Ohio 3537, 3563, 3574 30989-30991 7840 9/1965
Toledo, Peoria & Western 900-902 31061-31063 7847 11/1965
St. Louis-San Francisco Railway (Frisco) 725-731 31120-31126 7852 12/1965
St Louis-San Francisco Railway (Frisco) 732 31127 7873 12/1965
Southern 2641 31215 8072 12/1965
Baltimore & Ohio 3581 31262 7863 12/1965
Southern 2526 31283 8073 12/1965
Chesapeake & Ohio 3582 31439 7866 12/1965

Reused Serials

Owner Road Number(s) Serial Number(s) Order Number Completion Date
Louisville & Nashville 1101 28656 8071 4/1965

General Motors Diesel (GMD)

Owner Road Number(s) Serial Number(s) Order Number Completion Date
Canadian Pacific 8202-8213 A2035-A2046 C293 5/1964-6/1964
Canadian National 4000 A2061 C301 8/1964
Canadian National 4001 A2062 CR302 8/1964
Canadian Pacific 5014-5023 A2079-A2088 CR306 5/1965-8/1965
Canadian Pacific 5024-5025 A2123-A2124 CR312 1/1966

Export

Owner Road Numbers Serial Numbers Order Numbers Completion Date
Ferrocarril Nacional de México 8200-8214 29040-29054 710163-710177 8/1964-9/1964
Ferrocarril Nacional de México 8215-8229 29055-29069 710148-710162 11/1964-12/1964
Ferrocarril Sonora–Baja California (Mexico) 2307-2308 29871-29872 710211-710212 3/1965
Ferrocarril Nacional de México 8230-8254 30713-30737 710345-710369 10/1965

Santa Fe GP35 #3412 and a pair of GP30's (#3236 and #3212) head southbound/westbound through Ardmore, Oklahoma on March 22, 1974. Author's collection.

The GP35 proved itself very successful, selling more than 1,300 examples to numerous railroads such as  Union Pacific, Reading, Erie Lackawanna, New York Central, Great Northern, Soo Line, Milwaukee Road, Santa Fe, and Rio Grande.   

The later GP40 series, which carried a similar appearance to the GP35 but featured EMD's new 645 engine, saw even greater sales.  Today, GP35s can still be found in service across the country.

Sources

  • Pinkepank, Jerry A. Diesel Spotter's Guide.  Milwaukee: Kalmbach Publishing Company, 1967.
  • Foster, Gerald. A Field Guide To Trains. New York: Houghton Mifflin, 1996.
  • Marre, Louis A. Diesel Locomotives: The First 50 Years, A Guide To Diesels Built Before 1972.  Milwaukee: Kalmbach Publishing Company, 1995.
  • Schafer, Mike. Vintage Diesel Locomotives. Osceola: MBI Publishing, 1998.
  • Solomon, Brian.  EMD Locomotives.  Minneapolis: MBI Publishing Company, 2006.
  • Solomon, Brian.  GE and EMD Locomotives:  The Illustrated History.  Minneapolis:  Voyageur Press, 2014.

SteamLocomotive.com

Wes Barris's SteamLocomotive.com is simply the best web resource on the study of steam locomotives. 

It is difficult to truly articulate just how much material can be found at this website. 

It is quite staggering and a must visit!