Big End Performance 32002 Torque Converter Gm Small Bolt Pattern, 1900-2400, Automatic Transmission Torque Converters & Components, 13.5 13.5, 13.5 13.5, 7 7, 25 25. Automatic Transmission Torque Converters & Components, 019695400026, Big End Performance, Torque Converter Gm Small Bolt Pattern, 1900-2400.