SATURN SL1 INSTRUMENT CLUSTER GAUGES SPEEDOMETER

What Could Cause The Speedometer & Rpm Needles To Vibrate Then Drop To Zero And The Emergency Brake Light To Come On Then Go Back To Normal...

When I First Start The Car, If I Take Off It Will Act Like It Is Trying To Do It In 3rd Gear. If I Put It In 2 And Then Back To D, It Will...

Where Is The Speed Sensor In This Car. I Am Guessing The Model Of Car But My Speedometer Isn't Acting Right. Think It Might Be That Or Cable...