(which every state except Louisiana has accepted). But, basically, there was no contract for the extra work to be done - in order for a contract to exist, both parties must come to an agreement. Your understanding of the agreement with the shop was that he would replace the warranteed axle seal. Any work performed beyond that you should not be required to pay because you did not agree to the work, period. I hope you have a lawyer, if not then I highly recommend you get one. I hope this isn't too confusing, it has been a couple of years since I had my business law classes. Good luck!