These two should be totally unrelated... but they started going bad the exact same day.

The speedometer just reads zero, I know it's mechanical cable to the rear of the transmission... I took the cable out, the worm gear is not broken.

Same exact time, I notice my stock fuel gauge reads way past full on initial startup with the key and then takes several minutes to slowly draw down to the actual reading.

The fuel gauge does this even when the car is parked on a level surface, the first time I noticed it I was parked on a major incline so I thought the fuel sloshed to the back of the tank giving a false reading... but it does it on flat pavement too.

So, even though they are two separate problems, they started on the same day, the very same time. Could my cluster be going bad?