How to fix a malfunctioning transmission on a Vauxhall Insignia?

I have been experiencing issues with my Vauxhall Insignia's transmission, where it shifts gears roughly and sometimes gets stuck. This has become a safety concern for me while driving. What could be the root cause of this issue and is there a do-it-yourself solution available?

It's possible that there is a problem with the transmission fluid or filter. Check the fluid levels and condition first and if needed, have them replaced. It's also a good idea to have the transmission system checked by a professional mechanic.

This could be a sign of a faulty transmission control module. If the transmission is not receiving proper signals, it can cause shifting problems. Have a mechanic check the module and replace it if necessary.

In some cases, dirty or worn out transmission solenoids can cause similar issues. These can be cleaned or replaced by a mechanic for a relatively low cost.

It's also important to have the transmission fluid and filter changed regularly according to the manufacturer's recommendations. Neglecting this maintenance can lead to costly transmission repairs.