Thanks guys. Yes it's a 12 bolt and one tire is resting on the floor. I've done it over and over. Still get the 2/3 tire rotation to 1 rotation of the driveshaft.

I marked the tire at 6 o-clock and the driveshaft at about 90 degrees to center of rotation. Slowly rotated the tire and watched the mark on the driveshaft. When the drive shaft came back to the 90* position the tire mark was at about 2 o-clock. The other tire was sitting on the floor.

Last edited by MickeyP; 04/27/2024 1:49 AM. Reason: Added material

1956 3100 three speed 6 cyl. Stock with a few upgrades.