5 0 2019 Detroit RS21-4 Rear Axle Housing for a Freightliner M2 106 $900 USD Detroit Rear Axle Housing, RS21-4, 10 Hole Pilot, Air Drum Brakes, ABS, 53.5" Inner Flange To Flange, 16 Hole Flange. P/N A6813504603 (Replaces A6183504230). Removed From Freightliner... ConditionUsedFits To Make(s)FREIGHTLINERFits To Model(s)M2 106Stock Number1498-4 MLS Number13893084CategoryAxle Housings, Rear Last Updated10/29/2025 LocationFresno, CA, US Sold ByGarabedian Equipment (855) 794-___ SHOWNUMBERCall Seller Email Seller Save More Info