8-3/4 Auburn sure grip axle issue

You need something with a 1 piece side gear like my clutch or helical style sure-grips. See below:

Mopar 8 3/4" (8.75) Helical Gear Sure-Grip ("Sure-Trac")
Mopar 8 3/4" (8.75) Clutch Type Sure-Grip ("Powr-lok")