California's Railroad to the U.S. 1861 - 1996

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Model Train Help EBook

Southern Pacific/Cotton Belt


SP 4160 SSW 4200-4203

5 units rebuilt

4160 4200 4201 4202 4203
4201 4203

To reduce the maintenance on turbochargers, SP rebuilt a number of GP35's with non-turbocharged 645E engines, rated at 2000hp.

Not a real success, as far more GP35's were rebuilt keeping their turbo's. A similar experience with the rebuilt GP20's...

Other than the obvious lettering differences, there appear to be no detail differences between SP and SSW units.

Check also the GP35 page and the GP35E page for other References.


  • SP Dieselization by John Bonds Garmany
  • SP 1987/88 Motive Power Pictorial by Joe.W.Shine, - Page 97.
  • SP into the 90's Joe.W.Shine, - Page 172. - One photo.
  • 1995 Southern Pacific Motive Power Annual - by Bill Shippen
  • Southern Pacific Rails - a motive power finale by Peter Limas
  • Southern Pacific Historic Diesels Vol.13 by Joe Strapac

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