If a Winegard Travl'er, unless it was originally for DirecTV and converted to Dish, you cannot convert the antenna from Dish to DirecTV.
The turret and motor are different for a unit that were originally for Dish are not capable of being retrofitted to DirecTV. The dish turret is lacking key components used for DirecTV and they cannot be added. The turret must be replaced, which means a whole new antenna assembly unit.
A turret and motor that were originally for DirecTV can be converted to Dish (and back again).
2017 LTV Unity U24CB
2003 Foretravel U320
1999 Lazy Daze 30IB