How to Replace Rear Axle Seals 1998-2011 Ford Ranger

Introduction

This tutorial provides a step-by-step guide on how to replace the rear axle seals on a 1998-2011 Ford Ranger. This procedure ensures that your vehicle's rear axle remains free from leaks and operates smoothly. The instructions apply to various models within this range and will help you perform this repair with confidence.

Step 1: Prepare the Vehicle

• Safety First: Raise and support the vehicle using a floor jack and jack stands.
• Remove the Wheel: Use a 19mm socket to remove the lug nuts and take off the wheel.

Step 2: Access the Brake Components

• Push Back Caliper Piston: Use a pry bar to gently push back the caliper piston to create space for brake pad removal.
• Remove Caliper:
  • Use a 10mm wrench to remove the two caliper slider pins.
  • Set the caliper aside without stressing the brake hose.
• Remove Brake Pads and Rotor:
  • Depress the outboard pad clip with a small pry bar.
  • If the rotor is stuck, use a lug nut and a hammer to break it free.

Step 3: Drain Differential Fluid

• Remove Fill Plug: Use a ratchet to break the fill plug free to allow air in when draining.
• Remove Differential Cover:
  • Disconnect the ABS wire and emergency brake cable from the cover.
  • Remove all 10 mounting bolts while allowing fluid to drain into a pan.
  • Carefully pry off the cover if it's stuck due to gasket maker.

Step 4: Remove the Axle

• Locate and Remove the Axle Pin:
  • Ensure the vehicle is in neutral and secure.
  • Turn the drive shaft to locate the 8mm bolt securing the axle pin and remove it.
• Push Axle Inboard:
  • Gently push the axle in to dislodge the locking clip with a pick.
  • Carefully pull the axle out, being mindful of any fluid that may spill.

Step 5: Replace the Seal

• Inspect the Axle Area: Clean the area around the axle and inspect for damage.
• Remove Old Seal: Use a seal puller or pry bar to remove the old seal without damaging the differential tube.
• Install New Seal:
  • Lightly coat the back of the new seal with petroleum jelly.
  • Apply oil-resistant gasket maker to the outer edge of the seal.
  • Carefully press the new seal into place, ensuring it is straight.

Step 6: Reinstall the Axle

• Reinsert the Axle:
  • Align the axle and ensure it fits back into the housing.
  • Press the axle outboard and reinstall the locking clip.

Step 7: Reassemble the Differential

• Reinstall the Axle Pin:
  • Clean the threaded area and apply a bit of thread locker before reinstalling the pin.
  • Torque the pin to 22 ft-lbs.
• Clean and Reattach the Differential Cover:
  • Ensure the mating surfaces are clean and apply gasket maker.
  • Reattach the cover and torque the bolts to 33 ft-lbs.

Step 8: Reinstall Brake Components

• Reinstall Rotor and Caliper:
  • Clean the rotor's mating surface and install it.
  • Reattach the brake caliper and slider pins, torquing them to 18 ft-lbs.
• Adjust Emergency Brake: Access the adjustment port and set the emergency brake shoes.

Step 9: Refill Differential Fluid

• Add Gear Oil: Use the manufacturer-specified 80W90 gear oil, filling until it begins to drip from the fill hole.

Step 10: Final Check and Reinstall Wheel

• Reinstall Wheel: Put the wheel back on and torque the lug nuts to 100 ft-lbs in a crisscross pattern.
• Reattach Center Cover: Finish by putting the center cover back on.

Conclusion

You've successfully replaced the rear axle seals on your Ford Ranger. This process not only helps prevent leaks but also ensures the longevity of your rear axle components. If you're planning to perform similar maintenance on the other side of the vehicle, you can follow the same steps outlined here. Always remember to double-check your work and ensure everything is securely reassembled before driving.