The SNCF Class Y 9000 is the new designation for modernized and re-engined Y7100 and Y7400 shunters. The refurbishment will be undertaken by a consortium consisting of SNCF, Socofer and Voith Turbo. Socofer will refurbish 22 full locomotives at its Tours plant, and will deliver 178 kits to SNCF's Sotteville-Quatre-Mares workshops.