[vettestr]

corey,
Tough to do this alone but turn pinion yoke exactly ten times and count rotations that causes a tire to turn. Say tire turns 3 1/2 times then you have 3.50 to 1 ratio.
You can determine the rear gear ratio by counting revolutions. With the car up in the air or the rear tires anyway and safe. Place a mark or tape on the pinion yoke and the housing so you can easily and accurately count revolutions. Place tape on tire and fender or a way to count revolutions and have ball. Jeff c