727 No forward or reverse

It wouldn't affect all gears for the band to be off, as it would just skip second gear and shift 1-3.
Betcha that drum is tore up under the band and some of the metal went through the pump, converter and valve body causing low pressure and slipping of the direct clutchpack.

A little metal in the pan can be normal depending on what metal it is.
If it sticks to a magnet it's not a good sign, and absolutely ANY burning of anything is a rebuild at the very least.

Can you recommend a rebuild kit? Wanted to overbuild it a bit so it handles my 471 for some time... As there is zero choice of this stuff in my country I need to get something from the US market.

I have no automatic option in my gearbox, its manual shift only.

Also here is a photo of my pan content...

IMG_8608.JPG