I own a tc4 and recently installed a mamba max 5700 combo, the rest of the car is all stock, and I've broken something in the rear diff as im getting no drive in the rear wheels, I've removed the top cover off the diff and everything seems to be in order. Would locking the diff fix my problem and how would I go about locking the diff? I don't race the car but don't wanna lose any speed from it.