Ring gear dimension

33IMP said

Measure the o.d. of the carrier. That's the size of the ring gear usually.
(Gonna ask a silly question..... are you sure it's mopar?)

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Not positive but sure looks like one. I can measure the carrier, but that in itself will tell me nothing, if I don't know the size of the 8 1/4 or 8 3/4 ring gear opening.