What is causing my Vauxhall Astra's transmission to slip?

I have been noticing my Vauxhall Astra's transmission slipping while driving. It feels like the gears are not engaging properly. What could be causing this issue and how can I fix it?

One possible cause for your transmission slipping could be low transmission fluid levels. It is important to regularly check the fluid levels and top up if necessary. If the fluid is low, it could be causing the gears to not engage properly.

Another possibility could be worn out or damaged transmission belts. These belts are responsible for transferring power from the engine to the transmission. If they are worn out, they may cause slipping and need to be replaced.

It could also be an issue with the transmission solenoid or valve body. These are responsible for controlling the flow of transmission fluid and if they are malfunctioning, it can lead to slipping. It's best to have a professional mechanic check these components.