If you have pwm aux, or variable-flow aux they will pulse but so fast you won't be able to tell the difference.
If it hestiates in one direction only, try switching the coils (solenoids) around and see if the hesitation changes direction. If it does not change, try then switching the stems.
If it hesitates in both directions, BOTH coils and/or stems could be on the fritz, but not likely.
Things common then to act-ups in both directions are the switch on the handle, the valve spool sticking, the controller, and of course the wiring harness.
The outputs from your handle switch in neutral will be about 4 volts, or range with movement from very low or zero up to 8V or so. This is a potentiometer for controller input.
The controller is usually condemned by eliminating everything else. Oh yeah-the button pad can get you, too, but I don't know how to troubleshoot that thing, except for a feeling I get when I see the way lights flash on it.......=).
If you don't have variable flow, you still have the coils and stems but they are 12v on/off and simpler to troublshoot. Rather than a controller, you have relays, under the cab, a cluster of four, if I remember correctly. If they are getting worn, they can cause such problems, too.
Some stuff to look for, good luck