* Ford's official parts website (or a dealer): While they may not have free diagrams, a Ford parts website (or a visit to a Ford dealership) is your best bet for official diagrams. You'll likely need your truck's Vehicle Identification Number (VIN) to get the correct parts information and diagrams. This will ensure you get the correct diagram for your specific axle.
* Online parts retailers: Sites like AutoZone, Advance Auto Parts, NAPA Auto Parts, etc., often have diagrams available when you search for parts related to the rear axle. You'll need to know the axle's specifications (e.g., Dana 60, Dana 70, etc.). These diagrams might not be as detailed as the factory diagrams but can be helpful.
* Repair manuals: A Haynes or Chilton repair manual for your 1986 Ford F-250 should include diagrams of the rear axle assembly. These are available online and at auto parts stores.
* Online forums: Forums dedicated to Ford trucks (like the Ford Truck Enthusiasts forums) may have members who have scanned or photographed diagrams they could share. Search for your specific axle type and year.
Crucially, you'll need to identify your rear axle type. The best way to do this is:
1. Check your truck's documentation: Owner's manuals sometimes list axle specifications.
2. Look at the axle itself: The axle housing may have casting numbers or markings indicating the manufacturer (Dana, Ford, etc.) and model. A photo of this marking will help others assist you in finding the correct diagram.
3. Check the data plate: Look for the vehicle identification plate. While it may not specifically state the axle type, the information it contains might allow someone to cross-reference it.
Remember to always be cautious when working on your vehicle's axle. It's a critical component for safety and improper repair could lead to serious consequences. If you're not comfortable working on it yourself, consult a qualified mechanic.
