SD40-2 6844 (Frisco 954) by Frisco.org Posted on June 19, 2019 SD40-2 6844 (Frisco 954) SD40-2 6844 (Frisco 954) at Thayer, Missouri on August 29, 1981 (R.R. Taylor). This entry was posted in BN Patched, RT Collection and tagged 6844, 954, Electro-Motive Division, SD40-2. Bookmark the permalink.