Tools You'll Need:
* New speedometer cable: Ensure you get the correct one for your vehicle's transmission type.
* Socket set: Various sizes, likely including metric.
* Wrench set: Again, both standard and metric sizes might be needed.
* Screwdrivers: Phillips and flathead.
* Pliers: Needle-nose pliers may be helpful.
* Penetrating oil (PB Blaster, etc.): To loosen corroded connections.
* Shop rags: To clean up grease and oil.
* Jack and jack stands (recommended): For easier access to the transmission.
* Repair manual (highly recommended): A factory service manual or a Haynes/Chilton manual specific to your year and model will greatly simplify the process.
Steps (General Procedure - Consult your repair manual for specifics):
1. Disconnect the Battery: Always disconnect the negative (-) terminal of your battery before starting any electrical work.
2. Access the Speedometer Cable: This usually involves removing parts under the dashboard to reach the speedometer's cable connection. Your repair manual will detail this precisely.
3. Disconnect the Speedometer Cable at the Speedometer: This involves removing the instrument cluster (usually by removing screws and carefully unplugging connectors) and disconnecting the cable from the back of the speedometer.
4. Access the Transmission Connection: This is the more challenging part. You may need to partially or fully remove the front of the transmission housing depending on your car's configuration. You'll need to locate the cable's connection at the transmission. This often involves working in a tight space. Again, the repair manual is crucial here.
5. Disconnect the Cable at the Transmission: This connection usually involves a retaining clip or a nut. Penetrating oil may be needed to loosen a stuck connection.
6. Remove the Old Cable: Gently pull the old cable out of its housing. There might be some resistance.
7. Install the New Cable: Carefully feed the new cable into its housing, starting at the transmission end. Ensure it's seated properly at both the transmission and speedometer ends.
8. Reconnect the Cable at the Transmission: Secure the new cable using the retaining clip or nut.
9. Reconnect the Cable at the Speedometer: Reassemble the instrument cluster and connect the cable.
10. Reconnecting the Battery: Reconnect the negative (-) battery terminal.
11. Test the Speedometer: Start the car and test the speedometer to ensure it's functioning correctly.
Important Considerations:
* Lubrication: Some technicians recommend lightly lubricating the cable with grease before installation. Check your repair manual for recommendations.
* Cable Housing: Inspect the cable housing for damage. If it's damaged, you'll likely need to replace it as well.
* Tightening: Don't overtighten any connections.
* Safety First: Always use jack stands when working under your vehicle.
This is a general overview. A repair manual specific to your 1981 Chevy Malibu is absolutely essential for success. The exact procedure and locations of parts will vary. Failing to consult a repair manual could lead to damage to your vehicle.
