[ss3011]

We used to make underdrive gear sets by designing a drive sprocket with the minimum number of teeth and match that with a driven sprocket . Typically you add the drive and driven tooth count and that number is a constant. On the earlier GM FWD transmissions, that number was about 70. The best under drive ratio we could make was a 32/38 sprocket set. Anything smaller then 32 could not be packaged on the Drive sprocket support. So the best final drive ratio was 3.33, which gave an overall ratio of 3.95. That is why most of these cars had to put such short tires on them. It was hard to keep the engine up in its powerband with the wide ratios for 1st and 2nd gear.