0 Allison 2500RDS, , Transmission Cores, Fits to: , (Core) 2018 Allison (AT), TRANSMISSION ASSEMBLY- Model: 2500RDS, Serial Number: 6311676390, For more information about this item, give us a call. We ship worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921, Serial# 6311676390, ,