2023 PACCAR MR2014P3, Truck Tractor, Rear Rears (Tandem Rear or Single), Fits to: Peterbilt 579, (Used) 2023 Peterbilt 579, DIFFERENTIAL GEARS ONLY- Rear Axle Make: PACCAR, Model: MR2014P3SFRNN530-264, Ratio: 264, Serial Number: C8-1A11A27A00F2M20, Part Number: F0R07417279, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921, Ratio 264, Serial# C7-1A11A27A0CA2M20, Truck Year 2023 1XPBDP9X6PD708051