Hi,
The vehicle speed sensor is located near the starter motor. I attached a pic for you.
Here are the directions for replacement. Pic 2 correlates with the directions.
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1994 Geo Prizm L4-1.8L DOHC
Manual
Vehicle Power-train Management Sensors and Switches - Power-train Management Sensors and Switches - Computers and Control Systems Vehicle Speed Sensor Service and Repair Procedures Transmissions Manual
MANUAL
Remove or Disconnect
1. Negative (-) battery cable.
Vehicle Speed Sensor
See pic 2
2. Vehicle speed sensor (VSS) electrical connector from VSS.
3. One retaining bolt and VSS from trans-axle case.
Inspect
1. VSS driven gear for excessive wear or damage. Replace VSS as necessary.
Install or Connect
1. VSS into trans-axle case; secure with one bolt.
Tighten
^ Vehicle speed sensor (VSS) bolt to 11 Nm (97 lb.in.).
2. VSS electrical connector to VSS.
3. Negative (-) battery cable.
Tighten
^ Negative (-) battery cable-to-negative (-) battery terminal retainer to 15 Nm (11 lb.ft.).
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Let me know if this helps.
Take care,
Joe
Images (Click to enlarge)
Jul 30, 2020 at 8:09 PM