Originally Posted By parksr5
Maybe the more tenured in this crowd can answer a question for me?
Why is a 9" so much stronger than an 8 3/4"? Many talk about back bracing 8 3/4" rears and someone always says that it is a waste of time yet, to do it on a 9" is okay and not a waste.

For the most part, the two designs are very similar so; why is the 9" so much stronger? Couldn't you just do the same modifications to an 8 3/4" and have a similar result?


Seen broken Danas, 12 bolts, 10 bolts, 8 3/4's and the legendary 9er..........My 8 3/4 served my lowly slo azz car just fine in the 1.3's and in the 9's BUT every ring gear tooth has small cracks down deep so it WAS on it's way out or not............I now run Dr.Diffs nodular w/the good caps and 35's instead of the 30's I ran forever.......

Last edited by Thumperdart; 12/20/16 01:21 PM.
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....