Tag extended cab

Choosing the right leaf springs for your 1986 F-250 with the 460 CI engine and 4×4 involves considering how you plan to use the truck. The 460 is a hefty engine, so you’ll want springs that can handle the weight while providing enough capacity for your typical load.

Stock Replacement

If you’re looking to maintain or restore factory-like performance, you’ll want springs with a total capacity around 5,000 to 6,000 pounds, similar to the originals. This should be fine for standard use without any significant loads or modifications.

Heavier-Duty Use

For heavier-duty use, like frequent towing or hauling, consider upgrading to springs rated for a higher capacity. You might look at springs rated for 3,500 to 4,000 pounds per side, giving you a total of 7,000 to 8,000 pounds.

Key Considerations

• Ride Quality: Heavier springs might stiffen the ride, especially when the truck is unladen. Consider this if you use the truck daily without heavy loads.
• Compatibility: Ensure that any upgraded springs are compatible with your truck’s existing shock absorbers, mounts, and axles.
• Aftermarket Options: Brands like Tuff Country, Skyjacker, and Superlift offer quality aftermarket springs with various capacities. Make sure they’re designed to fit your specific truck model and intended use.

Installation Tips

When installing new springs, replace any worn bushings and check U-bolts for wear. Proper alignment is crucial to avoiding unnecessary wear on the suspension components and tires.

If you’re unsure about the exact specs, or if your truck has been modified over the years, measuring the current springs can also help when talking to a parts supplier. And as always, there might be more detailed advice over at the Bullnose Ford subreddit or possibly a video on the Bullnose Garage channel. Feel free to dive deeper there if needed!

Great question! When we talk about the leaf spring capacity, it’s typically rated per axle, which means you consider the leaf springs on each side of that axle together. So, if a set of leaf springs is rated for, say, 3,000 pounds per side, then the total capacity for that axle is 6,000 pounds.

In a truck like your 1986 F-250, the rear leaf springs usually bear the brunt of the load, so their total capacity is key for hauling and towing. The front springs also have their own capacity, but they primarily support the engine weight and are more about handling and ride quality than hauling.

To sum up:

• Per Side: Individual leaf spring capacity (e.g., 3,000 pounds each).
• Per Axle: Combined capacity of both sides (e.g., 6,000 pounds for the rear axle if each side is 3,000 pounds).
• Total Vehicle Capacity: The sum of both front and rear axle capacities, but keep in mind the vehicle’s GVWR (Gross Vehicle Weight Rating) dictates the overall safe operating weight, which includes the truck’s weight, passengers, and cargo.

If you plan to adjust or upgrade, always keep the total vehicle capacity in mind to avoid exceeding safe limits. If anything’s unclear or if you need more specifics, just let me know!

The curb weight of a 1986 Ford F-250 XL with a 460 engine, extended cab, 4-speed manual transmission, and 4×4 drivetrain typically falls somewhere between 5,000 and 6,000 pounds. Several factors contribute to this variability, including optional equipment, the condition of the truck, and any modifications it might have undergone over the years.

Factors Affecting Weight:

• Engine Type: The 460 big block weighs more than smaller engines, contributing to the upper end of the weight range.
• Cab Configuration: An extended cab adds extra weight compared to a regular cab.
• 4×4 Drivetrain: The 4-wheel drive system adds additional components, such as the transfer case and heavier-duty axles, increasing the curb weight.

Checking Exact Weight:

For the most precise figure, you can take your truck to a weigh station or look for a scale at a truck stop. The vehicle’s manual or the door jamb sticker can sometimes offer insights into its GVWR, which is different from the curb weight but helpful for understanding its capabilities.

If you need exact numbers for registration, towing, or planning modifications, weighing the vehicle is your best bet. If you’re doing any upgrades or restorations, keep these weight considerations in mind to maintain the balance and performance of your Bullnose. Let me know if there’s anything else you need!