Manufacturer Part Number : 223SY78. Application : Jeep J-100 Drum Brake Wheel Cylinder Kit. Type : Drum Brake Wheel Cylinder Kit. Drum Brake Wheel Cylinder Kit. Drum Brake Wheel Cylinder Repair Kit. 1969 Jeep J-100 w/Dual Rear Wheels (DRW); Bore: 1 In.; Exc.