I dont know about you Z, but on my 83 280zx, I have to take off the steering wheel, combo switch and its covers to get access to the dash screws. Then I got to be careful in pulling out the dash gauge to avoid breaking any clips. I have already removed it several times due to my speedo cable breaking as well, but the only difference is on mine its the small cable that keeps breaking. I dont know if its the trans or the fubared shaft that the previous owner put in. The shaft had to be cut and welded to fit, I dont know why but I am now trying to research to see if the shaft from my parts 83 manual 280zx will fit it. I'm also probably going to have to replace the trans since it is leaking fluid and will start slipping when fluid gets to low.