Hello, My Daughter just bought here first explorer, the transfer case was out of it, so I got a new one and put it in, but not knowing where to tune drive shafts due to every thing being apart when she bought it, I put it together how I thought it should be, but this must be wrong cause its got vibration and growl, can anyone tell me how to time the drive line, such as where the weights on the drive shafts (front shaft-back shaft) should be to each other? Thanks and To everyone Happy Holiday's