Here's a general outline. Always disconnect the battery's negative terminal before starting. This prevents accidental short circuits.
1. Gather Tools: You'll need a steering wheel puller, a socket (usually 1 inch or larger, depending on the nut size – check your nut first!), and a breaker bar or ratchet. You may also need penetrating oil (like PB Blaster).
2. Locate the Steering Wheel Nut: This is usually located in the center of the steering wheel, behind the steering wheel itself.
3. Apply Penetrating Oil (Optional): If the nut is difficult to turn, spray penetrating oil onto the threads. Allow it to soak for at least 15 minutes.
4. Remove the Steering Wheel Nut: Use the socket and breaker bar or ratchet to carefully remove the nut. Keep the nut and washer(s) safe. Some have a locking washer that should be retained.
5. Attach the Steering Wheel Puller: Carefully align the puller's claws with the holes on the back of the steering wheel. These holes may be hidden by a cap, which may need to be removed. Tighten the puller according to its instructions. This will pull the steering wheel off the steering shaft. Apply force evenly and slowly.
6. Remove the Steering Wheel: Once the puller has loosened the steering wheel enough, gently pull it off the shaft.
Important Considerations and Warnings:
* Alignment: The steering wheel's position is crucial for proper alignment. Make a note of its exact position relative to the steering column before removing it. You may want to use masking tape to mark its position.
* Shaft and Spline: The steering shaft has splines. Be careful not to damage them during removal.
* Safety: Have someone assist you to support the steering wheel as you remove it, as it can be heavy.
* Horn Contact: The horn contact is often part of the steering wheel. Be aware of its connection and how to reconnect it later.
* Airbag (Again): This procedure is NOT for vehicles with airbags. If your vehicle has an airbag, you *must* consult a service manual or professional mechanic. Disabling or removing an airbag incorrectly can cause serious injury or death.
This is a general guideline. Specifics might vary slightly depending on the exact model of your 1978 Pontiac Trans Am. Always refer to a repair manual specific to your vehicle for the most accurate and safe instructions. Failing to do so could result in damage to your vehicle or personal injury.