As stated on our home page, we will gladly and promptly reward you with a credit if you return your old torque converter to us within 30 days.   It's one of the ways that we express our appreciation to you for your business.  We pride ourselves in providing superior quality torque converters.  We guarentee every unit we ship.  We go to extensive measures to make sure our torque converters exceed the quality of your vehicle's original equipment.  It is extremely rare for one of our converters to be defective.  When such an uncommon instance occurs, we always take care of our customers by making a prompt exchange.