Earl is right. The old Grande guys that I knew hated the SD-9043's from the start. Computer problems, dropping loads, and their "jumping" habits were complained about from the beginning. By contrast, those old Grande guys who had been in love with the SD40T-2 Tunnel Motors came to love the GE AC's for their toughness, hard pulling capability, and better cab comfort. Those same Grande guys had little good say about the SD70ACE's, either.
As fpr the B-39 Dash 8's--the SLRG's being former LMX units-- BNSF guys that I knew that rand them back when didn't like them much--reliability being an issue.