View 1 Photo View 0 Videos Meritor-Rockwell MT40-14X Front Axle Assembly for a 2015 Peterbilt 579 Contact for price 2015 PETE 579 MERITOR MFS12E STEER AXLE, 3.74" DROP, 2 LEAF, ABS, DISC BRAKES, 12000 LBS, Serial#: NA, Hub Bolts: 10, Ratio: 3.90, Suspension: LOW AIR LEAF ConditionUsedRear End3.90 ratioFits To Make(s)PeterbiltFits To Model(s)579Will Fit Year(s)2015Part NumberMFS12EStock Number3858-PETE-6 MLS Number13749029CategoryAxle Assemblies, Front Last Updated9/30/2025 LocationSTURGEON COUNTY, AB, Canada Sold ByBadger Truck Parts Ltd. (855) 624-___ SHOWNUMBERCall Seller Email Seller Save More Info