As you may already know, no root cause has been identified despite the efforts by various folks on this forum to send failed gauges for failure analysis to Ford and Autometer. The result of this effort yielded a re-designed five (5) gauges (less Speedo and Tach :rofl) by Autometer with a stepper motor internal vs. stock OEM Aircore motor. Gauges are purchased directly from Autometer at a reasnoble cost vs. Ford parts bin- (I think I got this right :biggrin)
Don't know the answer to that, I heard the stepper motor (SM) is noisy or noisier than the Aircore one, not sure if that indirectly answer your response time question. On a side note, I appreciate the efforts by members here, Ford and Autometer for developing the new 5 SM gauges, but I think they fell way short on the SM speedo and tach. Who wants to bet if this was an F150 issue they would have nipped it in the bud from the get go.
Do you know if the redesigned gauges have the same dynamics (response time)?
Thanks, Jay