The cv joint gaiters on the drive shafts shouldn't affect the gearbox.
If this is an easytronic automatic, then to quote from the handbook:
"If a fault occurs in Easytronic , the control indicator lights up (that's the car / spanner light) . In the event of serious faults, an "F" also appears in the transmission display. It is possible to continue driving if only car / spanner lights up. Manual mode can then no longer be selected."
"If an "F" is also shown in the transmission display , it is not possible to continue driving. Have the cause of the fault remedied. We recommend that you consult a Vauxhall Authorised Repairer. The system's integrated self-diagnostics allows faults to be quickly remedied."
That basically means is that your car needs hooking up to a diagnostic fault code reader to establish what the problem is. I hope you are using a Vauxhall Authorised Repairer.
You may also find this thread interesting:
http://www.vauxhallownersnetwork.co.uk/index.php?threads/corsa-1-0-easytronic-fault.113617/
ChicksFan
December 2011