2021 Detroit DT12-AO, Truck Tractor, Transmission Assys, Fits to: Freightliner Cascadia 126, (Used) 2020 Detroit (AT), TRANSMISSION ASSEMBLY- Model: DT12-OA, Serial Number: 715386G2356821, Part Number: C07-00052-090, A 960 260 72 02, Engine: Detroit DD15, 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# 715384G2356821, Casting# 715384G2356821, Truck Year 2021 3AKJHHDR9MSMN9713