Hi all I'm new to this forum although I've had my 'baby' for about 6 years now. My problem is...about 4 weeks ago at 40 mph the auto gearbox wasnt changing up...foot down and after a 'clank' from the back it did, it seemed worse when it was warm. Then last Thursday, on my way to the garage funnily enough, it did it again, put foot down as usual, a massive clank this time and we ground to a halt! Engine still running, speedo showing going up and of course revs but I was going nowhere. My head full of 'thats it, the gearbox has had it', anyway I got towed to garage and this awful banging and clanking came from the back, mechanic has now told me its the rear n/s drive shaft and he cant check on the gearbox until the driveshaft is done. I did check the atf which was low so put some in prior of course to the final halt. I've been onto someone for a driveshaft but he says there are 3 different sizes for my car and my mechanic cant get it back on the ramp to measure it....so does anyone have any idea what size driveshaft I need??? Any ideas if the gearbox has gone?? I'm hoping its just the driveshaft. Thanks for reading and apologies for the length of this tome