The transmission /differential layout in the "Beast"
Checking the case for cracks. Use the cleaner to remove oils, spray penetrant,wait 20 minutes, remove excess penetrant,and spray developer. The cracks will show red.
This is the 1962 differential that i am rebuilding showing the gear contact patch. I am using gear marking compound to get a good mark.The pattern should be slightly bias towards the heel or outside of the gear and during heavy acceleration the pattern will shift to the center.This picture shows both the drive side (convex) of the gear and the coast side(concave) of the gear.