How to fix common transmission issues in a Ford Fiesta?

I've been noticing some problems with my Ford Fiesta's transmission recently. It sometimes makes strange noises and shifts erratically. How can I fix these issues and make sure my transmission stays in good shape?

One common cause of transmission issues in Ford Fiestas is low transmission fluid. Check your fluid levels and top up if necessary.

Another possible cause is a faulty shift solenoid. This can be fixed by a certified mechanic.