Hi this is my first post.I have bought a losi dbxl 32cc and i am having problems with the diffs.When i lift the back end up and rotate the rear wheels together they run easily without the front ones moving and the same if i hold the front wheels off the ground and rotate them they move easily even with the front wheels locked on the floor.But if i lift the car off the ground and turn one wheel the opposite wheel turms as it should in the opposite direction.So my question is could it be the center diff needs replacing.