So I took my 70 duster out for the first time in the 3.5 years I’ve owned it and everything went great except for when the speedometer made a loud snap noise and started bouncing all over the place. When I was doing around 55 it said I was doing 90 and when I was stopped it said I was doing 60. I removed the cable and took the cluster out but the needle never left the 20mph spot. I’ve been reading through here and see that it’s going to be expensive to repair the factory speedo. So my question is, if I get an aftermarket speedometer, how would I make it accurate for my gear ratio and tire size? I have a T56 magnum so I could go mechanical or electrical. Also what aftermarket speedometers do y’all have? I want something that goes higher than the factory 120mph.
Thanks
Thanks