View 4 Photos View 0 Videos Dana S21-170D Rear Differential for a 2019 Peterbilt 337 Contact for price (Used) 2019 Peterbilt 337, DIFFERENTIAL GEARS ONLY- Part Number: 515671, Serial Number: HN07628962, Make: Spicer, Model: S21-170D, Ratio: 5.57, Capacity: 21,000 Lbs, Reference images for... ConditionUsedRear End5.57 ratioFits To Make(s)PeterbiltFits To Model(s)337Will Fit Year(s)2019Part Number515671Stock NumberP-505016 MLS Number14427985CategoryDifferentials, Rear Last Updated6/14/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 3 Photos View 0 Videos Dana S21-170D Rear Axle Housing for a 2019 Peterbilt 337 Contact for price (Used) 2019 Peterbilt 337, DIFFERENTIAL HOUSING ONLY- Part Number: 515671, Serial Number: HN07628962, Make: Spicer, Model: S21-170D, Ratio: 5.57, Capacity: 21,000 Lbs, Suspension: Leaf... ConditionUsedFits To Make(s)PeterbiltFits To Model(s)337Will Fit Year(s)2019Part Number515671Stock NumberP-505014 MLS Number14427983CategoryAxle Housings, Rear Last Updated6/14/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 7 Photos View 0 Videos Dana S21-170D Rear Axle Assembly for a 2019 Peterbilt 337 Contact for price (Used) 2019 Peterbilt 337, COMPLETE REAR DIFFERENTIAL- Part Number: 515671, Serial Number: HN07628962, Make: Spicer, Model: S21-170D, Ratio: 5.57, Capacity: 21,000 Lbs, Hub Bolts: 10,... ConditionUsedRear End5.57 ratioFits To Make(s)PeterbiltFits To Model(s)337Will Fit Year(s)2019Part Number515671Stock NumberP-505012 MLS Number14427981CategoryAxle Assemblies, Rear Last Updated6/14/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 4 Photos View 0 Videos Dana S21-170D Rear Differential for a 2012 Kenworth T270 Contact for price (Used) 2012 Kenworth T270, DIFFERENTIAL GEARS ONLY- Part Number: 512327, Serial Number: HN03777831, Make: Spicer, Model: S21-170D, Ratio: 4.56, Capacity: 16,000 Lbs, Reference images for... ConditionUsedRear End4.56 ratioFits To Make(s)KenworthFits To Model(s)T270Will Fit Year(s)2012Part Number512327Stock NumberP-504584 MLS Number14427534CategoryDifferentials, Rear Last Updated6/13/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 3 Photos View 0 Videos Dana S21-170D Rear Axle Housing for a 2012 Kenworth T270 Contact for price (Used) 2012 Kenworth T270, DIFFERENTIAL HOUSING ONLY- Part Number: 512327, Serial Number: HN03777831, Make: Spicer, Model: S21-170D, Ratio: 4.56, Capacity: 16,000 Lbs, Suspension: Air... ConditionUsedFits To Make(s)KenworthFits To Model(s)T270Will Fit Year(s)2012Part Number512327Stock NumberP-504583 MLS Number14427533CategoryAxle Housings, Rear Last Updated6/13/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 7 Photos View 0 Videos Dana S21-170D Rear Axle Assembly for a 2012 Kenworth T270 Contact for price (Used) 2012 Kenworth T270, COMPLETE REAR DIFFERENTIAL- Part Number: 512327, Serial Number: HN03777831, Make: Spicer, Model: S21-170D, Ratio: 4.56, Capacity: 16,000 Lbs, Hub Bolts: 10,... ConditionUsedRear End4.56 ratioFits To Make(s)KenworthFits To Model(s)T270Will Fit Year(s)2012Part Number512327Stock NumberP-504581 MLS Number14427531CategoryAxle Assemblies, Rear Last Updated6/13/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 7 Photos View 0 Videos Dana S21-170D Rear Axle Assembly for a 2016 Peterbilt 337 Contact for price (Used) 2016 Peterbilt 337, COMPLETE REAR DIFFERENTIAL- Part Number: 515671, Serial Number: HN04841733, Make: Spicer, Model: S21-170D, Ratio: 5.57, Capacity: 21,000 Lbs, Hub Bolts: 10,... ConditionUsedRear End5.57 ratioFits To Make(s)PeterbiltFits To Model(s)337Will Fit Year(s)2016Part Number515671Stock NumberP-500623 MLS Number14256841CategoryAxle Assemblies, Rear Last Updated5/13/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 3 Photos View 0 Videos Dana S21-170D Rear Axle Housing for a 2016 Peterbilt 337 Contact for price (Used) 2016 Peterbilt 337, DIFFERENTIAL HOUSING ONLY- Part Number: 515671, Serial Number: HN04841733, Make: Spicer, Model: S21-170D, Ratio: 5.57, Capacity: 21,000 Lbs, Suspension: Air... ConditionUsedFits To Make(s)PeterbiltFits To Model(s)337Will Fit Year(s)2016Part Number515671Stock NumberP-500624 MLS Number14256842CategoryAxle Housings, Rear Last Updated5/13/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 4 Photos View 0 Videos Dana S21-170D Rear Differential for a 2016 Peterbilt 337 Contact for price (Used) 2016 Peterbilt 337, DIFFERENTIAL GEARS ONLY- Part Number: 515671, Serial Number: HN04841733, Make: Spicer, Model: S21-170D, Ratio: 5.57, Capacity: 21,000 Lbs, Reference images for... ConditionUsedRear End5.57 ratioFits To Make(s)PeterbiltFits To Model(s)337Will Fit Year(s)2016Part Number515671Stock NumberP-500627 MLS Number14256845CategoryDifferentials, Rear Last Updated5/13/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info