hey guys, When I was coming home from work tonight my gearbox or possibly something else went a bit wrong. The car was fine when I first started leaving work and got about 10 minutes into the trip home when I had to slow down for roadworks. I looked down and then saw my speedo wasn't reading anything, just sitting at 0k's (which I was going around 40k's). I also noticed the "D" on the Dash was flashing on and off, so I kept driving as I couldn't stop and once I was though the roadworks I went to speed up and it was stuck in a gear, id say second or third as the revs kept going up without any gear changes. So I turned the car off and on again, problem went away. Then drove for a bit then happened again so I did the same thing turned on and off again and it was gone. Took it for a longer drive and has not happened since. Any ideas what it could be? Is it something I should be worried about?