I just installed a new mast but before that I took the whole assembly apart thinking it was stripped. I still think the plastic gear inside is a little worn down. But I wanted to know how the motor turns on and off? Is it time? Amp draw? Because right now, the antenna is working, but if I hold down the buttons, it will pop on the stripped gear. So far, the only way I have found to get that pllatic gear is to buy an entire assembly.