When the computer detects a fault it will display gearbox fault. Jags do not tend to log faults as they occur but seem to take a few instances to set code. The display can still show a fault after start up and needs to be cleared with tool. Get codes read and if petrol engine check engine codes. A bad coil will play havoc with transmission computer. You need to provide more detail to get better advice ie. Year, model, cc. petrol/diesel. etc.
mags, March 2010