May be 17037/17038 might be using both sheds BGKT and SBI becoz Sabarmati providing WDP-4(4D,4B)series locos to trains is been increased recently...As it is one of the new shed providing WDP-4(4D,4B) series.....As I recently checked Sabarmatis WDP-4D on IRI ,it's showing no trains hauled by Sabarmati WDP-4D,this clearly means that SBI ko abhi abhi WDP-4D mil raha hai..new home for WDP-4(4D,4B) series....Production increased since 2013-14...Kyu ki I too saw Sabarmati WDP-4D with Kutch Express 8 days ago and also saw SBI WDP-4D standing at Ahmedabad recently ...