View 2 Photos View 0 Videos Allison 3000RDS-P Transmission for a 2020 Peterbilt 337 $2,250 USD 3000RDSP TIDB GEN 5 BEHIND PX-9 ENGINE, WILL INSPECT, 90 DAY WARRANTY, Serial#: 6511690169, Engine Make: PACCAR, Engine Model: PX-9 ConditionUsedEngine ModelPaccar PX-9Fits To Make(s)PeterbiltFits To Model(s)337Will Fit Year(s)2020Stock Number12424-3 MLS Number13279382CategoryTransmissions Last Updated5/15/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info