I have recently ran into a odd reared. I pulled this out of a mid 70s buck. The odd issue is that it is a typical bia 12 bolt 30 spline but has a 9.5 inch ring gear. I bought a soild spool before I actually measured ring gear assuming it was a 8.5. I contacted richmond in hope to find out exactly what I have and was told they had no idea. Has anybody else ran into this.
yea it was a regular 2dr 76 buick the spool i bought was a 30 spline and fit the axles. however it is defiantly measuring 9.5 across the ring. gm casting numbers and typical 4 point third member. the rear cover is the same pattern as the 8.875 just slightly bigger. Ive never run into a gm reared like this any thoughts?