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Originally posted by Denny Graham:
I give up! Now we got 10 bolts in the cover and 10 bolts in the pumpkin and 10 bolts in the ring gear.
Either you're trying to be funny or you need to spend some more time learning the lingo LOL!

In your thread starting question you refer to the center section. The center section and pumpkin are the same thing. That piece has a number of common names but differential is probably the best.

The strength of a differential is relative to the diameter of the ring gear and commonly given in inches, as in the 9 inch Ford or 8.25 GM. Another way to classify strength (and ring gear diameter) is the number of bolts required to hold the ring gear and in Salisbury GM differentials they are are grouped into strength class by the number of those bolts. 10 bolt, 12 bolt and 14 bolt are the sizes you most often see. Generally on those rears the number of ring gear bolts and cover bolts are the same.

While the number of cover bolts may help identify other rears, far as I know its only on the GM Salisbury rears that there is a direct relationship between the count of cover bolts and ring gear bolts.

Have I made it better or worse?

1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...