[Excaliber]

There was an offer made to fix it with no labor charges and discounted parts cost and this despite Tremec themselves would not warranty the repair. I'm not sure why Tremec denied the warranty, something about 'warranty time' ran out?

Hard to imagine a trans would simply strip third gear from simply running hard, no excess horse power in this case. UNLESS, it was a defective gear to begin with. If thats the case, it's likley this is not the first and won't be the last if Tremec had\has a production problem with that particular gear.

Other reports of 3rd gear being stripped linked to inferior gears?

I don't know, sounds like a reasonable offer to me, all things considered.