0 0 2021 Spicer S172 Rear Axle Housing for a Peterbilt 337 Newly Listed $1,028 USD (USED) Spicer S172 Brake Type: AIR DRUM Wheel Type: PILOT Suspension: PETE NEW LOW AIR LEAF Track Width : 72 Ref# S21-172 ConditionUsedFits To Make(s)PeterbiltFits To Model(s)337Part NumberS21-172Stock Number25918807 MLS Number14067511CategoryAxle Housings, Rear Last Updated1/1/2026 LocationSpencer, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info