Fuel Gauge Issues

It's a new mechanical limiter, a reproduction of the original. It seems to only do the jumping with the new gauge both of the others just go straight to 1/8 tank but those to move much slower than the new one. I'm thinking Dana67Dart is right and it's just the sending unit. I ended up taking apart the original sender and cleaning all of the contacts and it began to work. What I may do is swap the sending unit and float over to the newer 3/8 pickup.