This review is no reflection of the seller. I have purchased many products from the seller and have never had an issue with them or thier services. I have built over twenty transmissions for the Jato. This gear failed after 5 minutes of use. It just came apart inside the housing. I disassembled the transmission to make sure everything was as it was supposed to be, everything was. I don't know if it was a bad batch or what. I actually hold every certification Ford Motor Company offers to technicians and work as an automotive tech. Could it have been operator error,?, sure anything is possible.