So I've got another question. If I've got a bad voltage regulator.. which I do. Would that make the 4x4 not engage? Seeing as the 4 demand requires voltage to the magnetic rings to function. Am I missing something else? Is there a way to tell if the magnetic coils are bad?..what are odds that both woul be. I've got a voltage regulator on order.not sure if I should be ordering other parts as well. Any advice would be greatly appreciated.