Hi guys, was wondering if someone might be able to give me a bit of guidance.

Yesterday I had noticed that my fuel tank was near empty, and upon driving it on reserve to the gas station, I noticed it had absolutely no power and refused to gear up.
I couldn't go faster than about 40km/h...

I put in fuel and after a while it came right.

What happened there? Was this due to the fuel tank being empty for a while? Is there potentially something wrong with my gearbox?

Anything you can tell me will be greatly appreciated.
Thanks so much.