I was gonna say.. lolDon’t mind the terrible exhaust leak. The H pipe broke from its welds when I reinstalled it hahaha
run it up a 11,000' pass@Bent77 so far I would say that the liquid Teflon is working. What conditions could I recreate for the situation you were in?

I had about 800 miles on it and was crawling when it popped out of 2nd gear
I thought it would be noisier. Wasn’t expecting it to be so quiet. I didn’t put the mass pad back on the truck floor either.Drive it normal, change the case oil at 500 miles.
If it looks like anti seize (or NIC as @NorCal69 calls it Not In Can), then power shift it several times and keep whatever doesn't break...
40 channels or 23? That would give you an idea of the age.