Speedometer stops at 70 mph?

[T1R1]

So I went out for a little spirited drive the other day and my speedometer won't go past 70 mph. It works smoothly up until it hits about 70 then stays there until I slow down below 70 and picks back up working fine. It's a '77 160 mph electronic speedo. Is it the sending unit or the speedometer itself? Thanks for the help!

[PorscheGuy79]

You have reached critical velocity for the car, its trying to travel through time. Did you engage the flux capacitor? Check the jump coordinates?

Honestly that sounds kinda weird...it doesnt sound like a wire issue, more like its catching on something. Im no expert though.

[T1R1]

Really officer, I was only going 70!