| AT&SF GP40X 3806 at Corwith Yard, Chicago, Illinois, December 28, 1986, photo by Chuck Zeiler. Built in April 1978 (c/n 776054-5), eventually becoming BNSF 3036. This is one of ten GP40X locomotives built for the AT&SF, one of 23 ever built. The GP40X was a pre-production version meant to test technologies later incorporated into EMD's 50-series locomotives GP50 and SD50. Ten GP40X were delivered with an experimental HT-B truck design that became an option (but never used) on the production GP50. |