High pitched squeal noise with engine RPM. (Transmission?)

[Alex]

Evening,

What's this squealing noise and how can I mitigate it/where is it coming from?

https://imgur.com/a/QgyYKT2

(Not the scraping noise, that's the exhaust having a leak + missing straps. - unless that's a different issue causing it? Advice?)

I'm a bit stumped on it right now (timing belt??) thanks guys.

[daantjie]

Hard to tell from the clip to be honest.  Could be transmission pump whine if you're low on fluid.

[Alex]

Hard to tell from the clip to be honest.  Could be transmission pump whine if you're low on fluid.

Ooo, that's a good one, I'll check that when I get a chance.

[Alex]

The trans oil is all good, pristine colour and plenty, possibly a bit too much, but I don't think that's the issue. I have ordered new exhaust hangers, I'll see if that fixes the issue with it.