However, here's a general overview of the steps involved. Remember, this is a simplified explanation and specific procedures may vary slightly. Consult a repair manual specific to your 1990 Buick LeSabre for detailed instructions and torque specifications.
Tools You'll Need (at a minimum):
* Jack and jack stands (crucial for safety!)
* Wheel chocks
* Wrenches (various sizes, including metric)
* Socket set (including impact sockets if you have an impact wrench)
* Axle nut socket (often a special size)
* Axle puller
* Hammer and punch
* Torque wrench
* Penetrating oil
* Safety glasses
* Gloves
* Possibly a press (depending on the axle design and how difficult removal is)
* Drain pan for transmission fluid (if applicable)
General Steps:
1. Safety First: Park on a level surface, engage the parking brake, and chock the wheels. Use jack stands to securely lift the vehicle. Never work under a vehicle supported only by a jack.
2. Disconnect the Axle:
* Remove the wheel: Loosen the lug nuts before jacking up the car, then remove the wheel.
* Disconnect the brake caliper: Usually involves removing a bolt or two and carefully hanging the caliper out of the way. Be cautious not to damage the brake line.
* Disconnect the ABS sensor (if equipped): Unplug the electrical connector.
* Disconnect the driveshaft: If it's a two-piece driveshaft, you'll need to separate the axle from the driveshaft. This may involve removing a retaining clip or bolts.
* Remove the axle nut: This is often very tight. Use penetrating oil and a breaker bar or impact wrench if necessary.
* Remove the cotter pin (if present): This secures the axle nut.
3. Remove the Axle: This is often the most challenging part. You may need an axle puller to remove the axle from the differential. Some axles might require a press to remove them completely. Be prepared for resistance.
4. Install the New Axle: The installation is generally the reverse of the removal process. Ensure the new axle is correctly seated.
5. Reconnect Everything: Reconnect the driveshaft, brake caliper, ABS sensor, and axle nut. Torque the axle nut to the manufacturer's specifications.
6. Refill Transmission Fluid (if necessary): If you removed the axle with the transmission connected, you may have lost some transmission fluid. Check the fluid level and add as necessary.
7. Lower the Vehicle: Carefully lower the vehicle using the jack stands.
8. Test Drive: After reassembly, test drive the vehicle to ensure everything is functioning correctly.
Important Considerations:
* Axle Type: There are different types of axles (CV axles, etc.). The procedure will vary slightly depending on the type of axle your LeSabre has.
* Repair Manual: A factory repair manual for your specific year and model is essential. It will provide detailed diagrams, torque specifications, and other critical information.
* Parts: Ensure you get the correct replacement axle for your vehicle. Provide your VIN to the parts supplier to guarantee a proper fit.
Again, this is a simplified overview. This repair involves potentially damaging components if not done properly. If you're not comfortable performing this repair yourself, it's strongly recommended to take your vehicle to a qualified mechanic. Improper repair can lead to serious safety hazards.
