1. Identification and Location:
* Find your repair manual: This is the single most important step. It will show you the exact location of the VSS for your specific truck and transmission. The VSS is usually located on the transmission itself, often on the side or near the tail housing. It's typically a small, electrical sensor with a connector.
* Visual Inspection: Once you have a general idea from the manual, visually inspect the transmission. Look for a sensor that fits the description – it might have a single wire or multiple wires depending on the setup.
2. Tools Needed:
* Repair Manual (crucial): Provides specifics for your truck.
* Socket wrench and sockets: The size will depend on the sensor's retaining bolt(s).
* Ratchet: For ease of turning the socket.
* Extension(s): Might be needed to reach the sensor.
* Wrench (possibly): Some sensors have a retaining nut in addition to a bolt.
* Electrical connector disconnect tool (optional but helpful): To safely disconnect the electrical connector without damaging it.
* New VSS: Purchase a replacement sensor that's specifically designed for your truck's transmission and year. Get it from a reputable parts store and make sure it's the correct part number.
* Shop towels or rags: To keep things clean.
* Jack and jack stands (highly recommended): Safely lifting the truck will provide much better access.
3. Removal Procedure:
1. Safety First: Disconnect the negative battery terminal. This is essential to prevent electrical shorts. Place the truck on jack stands for safety if you're working underneath.
2. Locate the Sensor: Use your repair manual and visual inspection to precisely locate the VSS on the transmission.
3. Disconnect the Electrical Connector: Carefully disconnect the electrical connector from the sensor. A disconnect tool is helpful here to prevent damage to the connector.
4. Remove the Sensor: Remove the bolt(s) or nut securing the sensor to the transmission. This often requires a socket wrench and potentially an extension.
5. Carefully Remove the Sensor: Gently pull the sensor out of its mounting location. Sometimes there's an O-ring or seal; be careful not to damage it (or replace it if necessary as specified in your manual).
4. Installation Procedure:
1. Clean the Mounting Surface: Clean the mounting surface on the transmission where the sensor sits.
2. Install the New Sensor: Carefully install the new VSS into its mounting location. Ensure it seats properly.
3. Tighten the Bolt(s): Tighten the retaining bolt(s) or nut to the torque specification listed in your repair manual. Over-tightening can damage the sensor or transmission.
4. Connect the Electrical Connector: Securely connect the electrical connector to the new sensor.
5. Lower the Vehicle (if necessary): Carefully lower the vehicle if you used a jack.
6. Reconnect the Battery: Reconnect the negative battery terminal.
7. Test Drive: Test drive the vehicle to ensure the speedometer and other related systems (like cruise control, if applicable) are functioning correctly.
Important Considerations:
* Transmission Fluid: If you spill any transmission fluid during the process, be prepared to top it off.
* Torque Specifications: Following the torque specifications in your repair manual is crucial. Over-tightening can strip threads or damage the sensor.
* Professional Help: If you're not comfortable performing this repair, it's best to take your truck to a qualified mechanic. Improper installation can lead to further damage.
Remember, this is a general guide. Always refer to your vehicle's repair manual for the specific instructions and torque specifications for your 1995 Chevy truck. Failing to do so could lead to damage or injury.
