1 0 Isuzu R040 Rear Axle Housing for a 1999 GMC W4 Contact for price (Used) 1999 Gmc W4, COMPLETE DIFFERENTIAL HOUSING ONLY- Make: Isuzu, Model: R040, Ratio: 5.125, Capacity: 11,020 Lbs, Hub Bolts: 6, Brake Type: Hydraulic Disk, For more information about... ConditionUsedFits To Make(s)GMCFits To Model(s)W4Will Fit Year(s)1999Stock NumberP-63872 MLS Number12422156CategoryAxle Housings, Rear Last Updated9/30/2025 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info