Changed speedometer cable, still jumping

there is no physical connection between the needle and the shaft, its electromagnetic as the shaft spins a magnet and surrounding that magnet is an airgap and a metallic cup that IS coupled to the speedo needle. Sort of like a torque convertor with no fluid. The jumping you see that is NOT cable related (rare) is most likely the odometer drive mechanism that is sticking but that is a pretty light delicate movement that is very gear reduced. I knew of an import who's speedo needle didnt have a peg and it spun with the shaft like the 1/10 second hand of a stopwatch. It had made a physical connection between the flying magnet and the eddy current cup.