0 Allison B400R, , Transmission Assys, Fits to: Other Other, (Used) Allison, TRANSMISSION ASSEMBLY- Model: B400R Serial Number: 6510948122 Engine: N/A 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# 6510948122, Casting# 6510948122, Truck Year OTHER Other