Disclaimer: This is a general procedure and might vary slightly depending on your specific Ranger's configuration. Always consult a repair manual specific to your year and model for detailed diagrams and torque specifications. Improperly installed seals can lead to serious damage to your axle and differential.
Tools You'll Need:
* Jack and Jack Stands: Securely support the truck.
* Wheel Chocks: For added safety.
* Lug Wrench: To remove the wheel.
* Socket Set and Wrenches: Various sizes, including those for axle nuts.
* Hammer and Punch: To remove the old seal.
* Pry Bar: Possibly needed to help remove the axle.
* Seal Installer: Essential to avoid damaging the new seal. A socket that's the same diameter as the new seal's outside diameter works well.
* New Rear Axle Seal: Make sure you get the correct part number for your year and model.
* Grease: For the new seal and axle.
* Brake Cleaner: To clean parts.
* Torque Wrench: Crucial for proper tightening of axle nut.
* Penetrating Oil (like PB Blaster): To loosen stubborn bolts and nuts.
Procedure:
1. Safety First: Securely jack up the truck and place it on jack stands. Engage the parking brake and use wheel chocks.
2. Remove the Wheel: Remove the wheel and tire.
3. Remove the Brake Drum (or Rotor): Depending on your model, you'll have either a drum or rotor. If it's a drum, you'll need to remove the brake drum. If a rotor, you may need to remove caliper assembly first. Consult your repair manual for the specifics.
4. Remove the Axle Nut: Use the correct socket and break loose the axle nut. It will likely be very tight, so use a breaker bar if necessary and penetrating oil. Important: Once the nut is loosened, *do not remove it completely yet*. Support the axle shaft to prevent it from falling.
5. Remove the Axle Flange: Some Rangers require separating the axle flange from the backing plate. This usually involves removing some bolts or cotter pins. Your repair manual is key here.
6. Remove the Axle Shaft: With the nut still slightly on, carefully slide the axle shaft out of the differential. You may need a pry bar to help it out. The axle nut will likely come off now. This step can be tricky; you may encounter resistance.
7. Clean the Axle Housing: Clean the area around the old seal thoroughly with brake cleaner.
8. Remove the Old Seal: Use a hammer and punch to carefully tap the old seal out from the inside of the axle housing. Be careful not to damage the housing.
9. Install the New Seal: Using your seal installer tool (or appropriately sized socket), carefully press the new seal into the axle housing until it is flush. Make sure it sits squarely. Don't hammer it in – use even pressure.
10. Clean the Axle Shaft: Clean the axle shaft where the seal contacts thoroughly.
11. Grease the New Seal and Axle: Apply a thin layer of grease to the lip of the new seal and to the axle shaft where it will contact the seal.
12. Reinstall the Axle Shaft: Carefully slide the axle shaft back into the differential housing.
13. Reinstall the Axle Nut: Thread the axle nut back onto the axle shaft. Do not tighten it yet!
14. Reinstall Flange (if applicable): Reattach the axle flange to the backing plate.
15. Tighten the Axle Nut: Tighten the axle nut to the manufacturer's specified torque. This is incredibly important; improper tightening can damage the bearing or seal. Use a torque wrench!
16. Reassemble everything: Reinstall the brake drum or rotor, wheel, and tire.
17. Lower the Truck: Carefully lower the truck from the jack stands.
18. Test Drive: Take a short test drive to ensure everything is working correctly and there are no leaks.
Important Notes:
* Repair Manual: Get a repair manual specific to your 1994 Ford Ranger 2WD. It will provide detailed diagrams, torque specifications, and troubleshooting information. This is critical for success.
* Safety: Always use jack stands and wheel chocks. Working under a vehicle that's not properly supported is extremely dangerous.
* Parts: Ensure you purchase the correct parts for your specific truck.
* Professional Help: If you are not comfortable performing this repair yourself, take your truck to a qualified mechanic.
This is a complex repair. If you lack experience with automotive repair, it's best to seek professional help. Improper repair can lead to serious damage and injury.
