View 6 Photos View 0 Videos Dana-Spicer S20-045B Rear Axle Assembly for a 2016 Peterbilt 579 Recently Updated $5,995 USD (Used) 2016 Peterbilt 579, COMPLETE REAR REAR TANDEM- Spicer® EconoTrek™ Tandem Axle. Front Drive Rear and Tag Rear no gears. Make: Spicer/Dana, Model: S20-045B, Serial Number: HN04227810,... ConditionUsedRear End2.69 ratioFits To Make(s)PeterbiltFits To Model(s)579Will Fit Year(s)2016Part Number7051751Stock NumberP-51009 MLS Number12130173CategoryAxle Assemblies, Rear Last Updated3/12/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info