Not a big one, but big to somebody.  New battery in the Dozer, New Batteries in the controller.  I really think it is in the controler.  Anyone, know what should do next.  I think they have lost their sync with each other or bad controller.  Any ideas is appreciated.

it is a 49.860 MHz

 Oh, It will take off and go for a split second here and there.

P.s.  This thing is a Blast when it is going