View 2 Photos View 0 Videos Dana-Spicer 21-172D Rear Axle Housing for a 2020 Peterbilt 337 Recently Updated $1,295 USD GOOD USED HOUSING ASSEMBLY/ LOCKER /AIR BRAKE/DRUM, Serial#: N, Hub Bolts: 10, Suspension: PACCAR LOW AIR, Brake Type: DRUM ConditionUsedFits To Make(s)PeterbiltFits To Model(s)337Will Fit Year(s)2020Part NumberNAStock Number12424-8 MLS Number13282021CategoryAxle Housings, Rear Last Updated3/12/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info