[Romster]

Same thing, beeps then goes. Hmmmm.....Hmmmmm.........
-Ok did you check the mesh on pinion and spur gear.
-Make sure the servo wires are correct order on receiver example
(white-red -black)
Ok if not try the transmitter see if it's on reverse setting.
Let me no or try to get a picture of your set-up in buggy or truck.
Maybe I could see what's the problem.
I will compare it to my set-up. I am looking at my buggy right now trying to figure out why yours is not working..