833 aluminum overdrive reinforcement

I won't dispute the guy repaired a transmission that was on its way out
in that article. But I have never seen a transmission that needs this repair myself.
I have a direct connection aluminum case that was made with the steel bushing so I would go along with the fact that Chrysler deemed the bushing needed in a racing application.
Not so with the production line aluminum cases. No bushing.
If a countershaft ever does get hammered over away from the main shaft enough for a tooth to jump it would be over in a split second. Instant broken case iron or aluminum.

No disagreement here. I have several 833OD's sitting on the bench and none of them seem to have any countershaft issues that would require a bushing. The ones that I know about that were run behind 440's didn't have the sleeves either, just the stock cases.

I can see how the countershaft could theoretically develop issues, and it sounds like the one mentioned in the article had issues, but I've never seen it myself. And although I haven't done it, I have heard of at least one other 833OD that was in a car that destroyed an 8 3/4 rear without destroying the 833OD (the 440/833OD e-body that was raced that I referenced above).