I don't know if the speedometer can affect the throttle body but it still isn't working. That being said about every 100 miles the throttle body light will come on. The engine will stutter and then stall. It also has the hemi tick.
I was told it has a new throttle body and it looks like a new one. I'm looking for a starting point. I replace the fuse block already due to other issues.

 

Pull the throttle body out, check the orange gasket and make sure its not damaged and seated properly, clean the inside of throttle body with brake cleaner, dont spray the electricals! Let it dry and assemble again, then pull maf sensor and clean that too. Air in a can works great, just dont pry the sensor, that worked on my 03

 

I'd use throttle body spray vs brake cleaner, especially on the areas where the butterfly seals. There are sensitive seals and coatings that brake spray can damage.

 

I had my check engine light come on and upon reading error said throttle body and TBI gaske . I replaced both and it seemed to work but the check engine light keeps coming back on and the error is still reading TBI gasket. I have tried the tips to reset the sensor to no avail. Can a bad positive battery cable cause this? Any other ideas?