1. Gather Tools and Parts:
- Ensure you have the necessary tools, including wrenches, sockets, a torque wrench, a press, and a gear puller.
- Obtain the replacement gears, bearings, and seals.
2. Prepare the Vehicle:
- Lift the vehicle and safely support it on jack stands.
- Remove the rear differential cover to access the gears.
3. Remove the Pinion Gear:
- Remove the pinion shaft nut using the appropriate wrench or socket.
- Use a press to push the pinion gear off of the pinion shaft.
4. Remove the Ring Gear:
- Use a gear puller to remove the ring gear from the differential.
5. Replace the Bearings:
- Use a punch and hammer to drive out the old bearings from the differential housing.
- Clean the bearing seats and apply a thin coat of sealant.
- Press the new bearings into the differential housing.
6. Install the Ring Gear:
- Position the new ring gear on the differential and secure it with the ring gear bolts.
7. Install the Pinion Gear:
- Press the new pinion gear onto the pinion shaft until it's fully seated.
8. Set the Pinion Preload:
- This is a critical step that requires a dial indicator to accurately measure the pinion's axial movement. Follow the manufacturer's specifications to achieve the correct preload.
9. Install the Pinion Shaft Nut:
- Tighten the pinion shaft nut to the specified torque using a torque wrench.
10. Apply Sealant and Reinstall Cover:
- Apply a thin layer of sealant around the differential cover.
- Reinstall the differential cover and tighten the bolts.
11. Refill the Differential:
- Add the recommended type and quantity of gear oil to the differential.
12. Road Test:
- Test the vehicle on the road to ensure it shifts smoothly and there are no abnormal noises.
Note: It's crucial to follow the exact procedures specified by the vehicle's manufacturer or workshop manuals. Improper installation can adversely affect how your vehicle drives and may lead to premature wear or damage to the components. If you're not comfortable performing this task or lack the necessary tools and expertise, it's advisable to entrust this job to a qualified mechanic or automotive repair shop.
