We need you to measure from the face of the 3 bolt flange on the transmission to the face of the 4 bolt flange on the differential, and also the type of vehicle/transmission/differential information in the order notes! If it has a rubber isolator on the transmission, remove it before taking the measurement. Please list these measurements, along with the model and year of the car and differential, and the type of transmission in the order notes. Please call if you are unsure about how to determine this information. Thanks!