Rapid Speedometer fluctuation and clicking? ‘20 silverado

[mikystyle]

Just noticed this today while taking a long trip. Intermittently at just about any speed, I would hear a light ticking sound like a relay opening and closing behind the dash and the speedometer would drop 2-3mph then it would click again and the Speedo would jump back 2-3mph. I could see the speed fluctuation on both the needle gauge  and the the digital speed readout. Again it appears to be an intermittent issue, doing for about a 2 mile stretch then normal for another 3-5miles then it’ll do it again. Truck is a 2020 RST with the black widow package. Any ideas? 

[mikystyle]

Was able to capture a video today. Does it once in the beginning and goes from 66mph up to 70mph and then it does it one more time towards the end and goes from 71 to 75. Any input would be much appreciated. If you listen closely you can hear the clicking noise, again sounds like a relay behind the dash. Seems to do it in all situations at just about any speed:

 

[Keegan Ccunnungham 74]

Did you ever figure this problem out I am having the same problem?

[silveradosid]

On the FORD side of Things... Sorry Boys i dont think your going to get a reply