Fellows..

I reckon i had an LSD...the seller gave me assurance that the LSD was working okay...was surprise to see that when tested via the wheels, both were not moving in tandem...so lets set aside if he is truthful or not, what i am interested is how to move from here...can we fix it (assuming that the LSD is faulty)...how can we assure that the LSD is faulty...am i to change to a new LSD or a helical ITR LSD...what would the best choice....