Toyota,Can too much transmission fluid cause speedometer malfunctions?

Shortly after I had my entire automatic transmission rebuilt, I received two traffic citations. I later had my oil changed (by a different auto shop), and they found that my transmission was over-filled.

I know enough about cars to know that too much transmission fluid will cause a transmission to "slip". However, I need a Toyota transmission expert to reply to this message, and indicate the "possibility" or "probability" that a speedometer can malfunction when there is too much fluid in the transmission.

My car has 130000 miles.
My car has an automatic trans