Since most 1996 Achievas had rear drum brakes, I'll focus on that procedure. If you have rear disc brakes, you'll need a different approach, and consulting a repair manual specific to your vehicle is strongly recommended.
For Rear Drum Brakes (Most Likely):
This adjustment is usually done at the rear cable adjuster, located near the parking brake cables where they connect to the rear brake mechanisms under the vehicle. You'll need to get under the car for this.
1. Locate the adjuster: This is typically a small, toothed wheel or nut with a cable attached. It's near the rear of the car, fairly close to where the parking brake cables attach to the brake backing plates. A repair manual for your specific year and model will show the exact location.
2. Engage the parking brake: Fully apply the parking brake.
3. Adjust the cable: Turn the adjuster wheel or nut. Turn it *clockwise* to tighten the cables and increase parking brake effectiveness. You'll likely need to do this a little at a time, checking the brake's holding power after each adjustment.
4. Check the engagement: Release the parking brake and re-engage it. You should feel a firm engagement. Test the holding power by attempting to roll the car. It should hold securely on a slight incline.
5. Repeat as necessary: Continue adjusting until the parking brake engages firmly, holding the car on a moderate incline after approximately 3-5 clicks of the parking brake lever. Too much adjustment may make it difficult to release.
6. Release the parking brake: Once the correct adjustment is achieved, release the parking brake.
Important Considerations:
* Safety First: Always use jack stands and chocks when working under your car. Never rely solely on a jack.
* Repair Manual: A repair manual specific to your 1996 Oldsmobile Achieva is highly recommended. It will provide diagrams and detailed instructions specific to your vehicle's brake system. This is crucial for avoiding mistakes.
* Professional Help: If you are uncomfortable working under your car or are unsure about any step, take your Achieva to a qualified mechanic. Improper brake adjustment can be dangerous.
* Wheel Cylinders: If the parking brake is weak despite adjusting the cables, it may indicate worn or damaged rear wheel cylinders. This requires more extensive repair.
Remember, this information is for general guidance only. Always consult your vehicle's repair manual for the precise procedure and safety precautions specific to your 1996 Oldsmobile Achieva. Improper adjustment can lead to brake failure, so proceed with caution.
