Have a 3 speed tranny that I'm rebuilding in conjunction with my engine rebuild. I pulled the speedo gear which has been working fine. I also had bought a NOS speedo gear off Ebay which was supposedly for my tranny. They are exactly the same except for the gear itself. My gear teeth are oriented one direction (lean left) and the new unit gear goes the other direction (leans right). Other than that problem, they are exactly the same. Any ideas?