2001 Toyota Corolla Werid Speedometer problem

Hello All,

I press on the gas, and my speed is 0 (but I'm moving). I let go of the gas and let it coast, my speedometer comes alive again. I've checked the vehicle speed sensor (VSS) and it's not it. It generates about 12 volts 4 times per rev of the pinion. I'm getting about 12 volts from the harness as well. So it's not like its not getting voltage. I use an OBD reader and it corresponds to what the speedometer reads (fluctuating as mentioned). What's the problem here? Is there something that links the speedometer to engine revs? Please advise.