Do you still have the stock Futaba antenna in your radio? if not put it back in. I had the same problem eariler this year, we got a new local track that was bigger than the old one we use to race on and the back straight was farther away from the diver stand than the old one was and I lost signal, I rebinded, changed RX's and everything else but nothing helped till I put the stock antenna back into my transmitter then all my glitching was gone.