Yup. That T-5's a goner with slicks...... or DOT "slicks"
(high HP, slicks and missed shifts are the kryptonite for that trans)
Never broken an 8" diff. I've broken leaf spring segments, u-joints, engine mounts, etc. though.
As the drill sergeant said, "I taught you everything you know. I didn't teach you everything I know."
"Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so."
- Douglas Adams