if you need another speedo, i'm assuming for a GT, i have one that seems to work. never hooked it up, but the needle bounces freely, and if you put the eraser end of a pencil in it, and spin the pencil fast the needle jumps. let me know if you want it, 10 bucks its yours. on the front it says w=897 reads 61,560
The opel speedo's are driven by a magnet and they have a clock spring that it acts against to make the needle go back and forth. The magnet is permanent on the drive shaft with little failure capability. But the clock spring could easily be broken in your speedo. These springs were adjusted for calibration so replacing them would be tough. They are interesting to take apart tho . One note on replacement, just keep your w= the same, it is the calibration.
I have a similar problem. When I got my GT the speedo was DOA. I replaced the speedo cable and found that the flex drive inside the 90 Degree drive off of the transmission was broken as well. I replaced the flex cable inside the 90 degree drive with a solid piece of rod and that got everything working, but my speedo jumps violently. The odometer works fine but the speedo is unusable. I can't decide if the problem is in the 90 degree drive or the speedo, what do you guys think?
Not long after I bought my GT a year ago, it did the same thing. Over the winter I took it out and took it apart. The spring that was mentioned before was OK but the needle was hanging up just enough that neither the magnet or the spring could move it. If I remember right the needle goes through a plastic bushing and then seats a sharp tip in another bushing. It finally freed up by just playing with it and readjusting. So far it is still working.
The biggest pain for me was taking the the chrome ring off and replacing with out cracking the glass.
There really isn't an adjustment for that needle but there is one for the main shaft. I can see the nylon getting dry or something after time. It would also explain the stuck at 30 mph part.
I had the same problem with one of mine. I found out that they are fairly picky about length. as far as that 90 degree drive shaft. If it's too long it binds and causes problems. The stock one is 1.560 long and .1 square. it is made out of the flex cable like a speedo cable. I have one left.
I have searched, but can't seem to find the information I need. In the instrument panel there are several bulbs used for illumination of the gauges, lights over the switches, and the cluster between the tach and the speedo.
I have my instrument panel almost rewired completely. I want to put...
I know I’m in the vast minority, but I want to get the system in my Manta working again. The buzzers were removed (anyone have any?) and the seat sensor will trip the light on every bump. Looking under the driver’s seat there’s a wire that’s disconnected. Anyone know where they go or can reply...
Went through the normal fault find process earthed wire at tank end across fuel gauge goes up to maximum so not gauge got to be sender.
Just fitted new fuel sender from Opel GT Source ( removed transit pin and warning sticker ) checked earth wires clean and tight and plenty of fuel