8 3/4 woes

Ouch! 489 Case? A Ratech solid spacer crush sleeve eliminator may help reduce pinion gear deflection some, but definitely time to consider an upgrade in the future.
It’s an aftermarket 489 case. I’m going to eliminate the crush sleeve which I thought I did when it was put together several years ago. Going to fix this one, and start saving for an S60 or 9”. Also going to build a new driveshaft with 1350 joints.