M81 Complete Gearbox$954.00 Complete replacement gearbox for MyTana M81 cable machine. M81 Complete Gearbox quantity Add to cart Description Description Complete replacement gearbox for MyTana M81 cable machine. Part no. GEARBOX.COMP Related products Drive Springs $15.00 – $18.00 Select options Gearbox Gasket $9.50 Add to cart 7″ x 5/8″ Pulley $81.00 Add to cart 1/3 Hp Electric Motor $797.00 Add to cart Revolving Arm for M755 $134.00 Add to cart