The crush sleeve also gets additional crush with a blow to the pinion flange. Then the pinion bearings loose preload and bad things happen.
There are several sources of those solid spacers. Ring Pinion Biz that advertizes on ih8mud has them, it sounds like Kurt has them etc.
I see that Cumminscruiser is in Greenwood, not too far from Sacramento. River City Differentials (Sean) in Rancho Cordova makes them if requested on his lathe when he sets up your diff. Charges an extra $35. He has done 4 for me with new aftermarket gear sets. I've never been super happy with West Coast Differentials which is also in Sacramento and while it's a good place to get parts, I don't recommend it as a place to have work actually done.
There are several sources of those solid spacers. Ring Pinion Biz that advertizes on ih8mud has them, it sounds like Kurt has them etc.
I see that Cumminscruiser is in Greenwood, not too far from Sacramento. River City Differentials (Sean) in Rancho Cordova makes them if requested on his lathe when he sets up your diff. Charges an extra $35. He has done 4 for me with new aftermarket gear sets. I've never been super happy with West Coast Differentials which is also in Sacramento and while it's a good place to get parts, I don't recommend it as a place to have work actually done.