0 Allison B400R, , Transmission Assys, Fits to: N/A N/A, (Used) Allison TRANSMISSION ASSEMBLY- Model: B400R Serial Number: 6510693955 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# 6510693955, Casting# 6510693955, Truck Year OTHER N/A