Troy Bilt LH Axle Assembly No. 938-04006A-0637. This is an OEM Troy Bilt left hand axle assembly part numbers 938-04006A-0637, 938-04006-0637, 938 04006A 0637, and 938040060637. It replaces OEM part number 638-04006.
Troy Bilt RH Axle Assembly No. 938-04005A-0637. This is an OEM Troy Bilt right hand axle assembly part numbers 938-04005A-0637, 938-04005-0637, 938 04005A 0637, and 938040050637. It replaces OEM part number 638-04005.