Happy New Year! I have the rear live axle completely out of my 62 TR4. The car came with OD originally and I wanted to check to see the diff ratio. Is it as simple as counting the teeth on the crown wheel (ring gear)? I have 37 teeth so assuming 3.7 to 1 ratio?? Thanks in advance! Jim Henningsen Ocala, FL 62 TR4 x2 75 TR6