7 0 Eaton RSP40 Rear Axle Housing for a Peterbilt $999.99 USD Eaton RSP40 Housing Rear, Rear, Peterbilt Flex Air / AG 380 Suspension, will work with new style Low air leaf/AG400L that does not have welded on perches. ConditionUsedFits To Make(s)PETERBILTStock Number15424 MLS Number13908215CategoryAxle Housings, Rear Last Updated11/4/2025 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info