OOOps! you're right . I was wrong. It's actually a 3.92 in the front and a 3.90 in the rear. I told those idiots at GM not to do that, but they went ahead and did it anyway. Who knew?
This information provided to you from the 1960/61/62 ST-9 Service manual supplement for tilt cab/ 4 wheel drive/ and Powermatic transmission.Section 16-16.
