M81 Complete Gearbox$909.00 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 1″ Pillowblock $21.00 Add to cart M661 Drive Arm $37.00 Add to cart Autofeed Movement Assembly $100.00 – $145.00 Select options Revolving Arm for M755 $128.00 Add to cart 2″ O.D. x 5/8″ Pulley $29.00 Add to cart