HD Front Driveshaft, 66-77 Ford Bronco - Made in USA SKU: 8572

Heavy Duty Front Early Bronco Driveshaft

When you're tackling tough terrain in your Early Bronco, the last thing you want is a driveshaft that can’t keep up. That's why we’ve designed our Heavy Duty Custom-Built Front Driveshafts for those who demand more. Unlike weak, imported options out there, our driveshafts are built right here in the USA, engineered for maximum strength and durability, and guaranteed to outperform anything else on the market.

Why Settle for Less? Cheaper driveshafts might save you a few bucks upfront, but they’re prone to failure when you need them most. Inferior materials and poor construction lead to weak U-joints, flimsy yokes, and subpar tubing that can't handle the stress. When those fail, you're left stranded—and no one wants that.

Our Solution:

• Premium 1310 Series U-Joints: Serviceable with grease fittings right in the bearing caps for easy maintenance. This isn’t your run-of-the-mill setup; it’s built to last under the toughest conditions.

• Custom Forged Slip Yokes: These aren’t just stronger; they’re about twice the strength of the standard issue. Built to last, and ready for adventure.

• Heavy-Duty Tubing: 2" DOM tubing nearly doubles the yield and tensile strength compared to the CREW (cold rolled electric welded) tubes you’ll find in lesser products. It’s the backbone of a driveshaft that won’t let you down.

• Top-Tier CV Components: Manufactured by Spicer, Neapco, or their affiliates, these parts ensure that every piece of your driveshaft works together seamlessly for maximum flexibility and strength.

• Built for Performance: Includes a service tool for greasing the center pivot of the CV assembly—because we know maintenance is key to longevity.

Made right here in the USA, our driveshafts are crafted for those who understand that quality matters. This is not just a replacement part; it’s an upgrade that ensures your Bronco is ready for anything. So why risk it with anything less? Choose the driveshaft that's as tough as your rig.

Fitment Details: Our driveshafts are designed to fit Dana Spicer 1310 series yokes common on most Early Broncos. If your transfer case has a Cleveland style yoke, swap it out with our #8596 Transfer Case Yoke for the best fit. 

Invest in the best—because your Bronco deserves nothing less.

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66-77 Ford Bronco Driveshaft Identification:

From 1966-70, the Ford Bronco came with a Borg Warner driveshaft also known as Cleveland style driveline. From 1971-77, Ford switched to using Dana Spicer for their early Bronco drive shafts. Both styles of driveshaft used constant velocity joints. When identifying your early Bronco's drive line, it 's important not to just go by the year of the Bronco. Many Borg Warner Cleveland-style drivelines have already been upgraded to the Dana Spicer style due to availability the past few decades. The best way to tell which driveshaft you have is to see if your driveshaft uses external snap rings. If you can see the snap rings on the outside of the bearing cap, it's a Dana Spicer-style driveshaft.

Another way to tell the difference is to measure the bolt pattern on the transfer case yoke. All of our driveshafts are Spicer style and you will need a transfer case yoke if you are converting from the old Borg Warner.

How to measure your 1966-77 Ford Bronco Driveshaft

Wild Horses has driveshafts to fit your Bronco. While a stock length driveline will still work on Broncos with a minor suspension lift, this is not the ideal setup. Even with a small lift, the drive shaft is not long enough for a proper fit. We stock driveshafts to fit from stock height to 6 inch suspension lifts. When ordering a new drive line for your classic Ford Bronco, it is best to use the working measurement to ensure you get the right driveshaft. Also known as the running length, this is the measurement from the yoke on the transfer case to the yoke on the rear end. Measure from center of bearing cap to center of bearing cap with the suspension fully loaded to normal ride height.


Note: The working measurement is not the length of the driveshaft itself, but of the distance between the mounting yokes. The running length is taken with the Bronco sitting on level ground and loaded as normal. The rear drive line usually measures between 33.5 and 36 inches. The front driveshaft typically measures from 23 to 25 inches. If your measurement falls between one of the lengths we offer, we generally recommend you order the next larger size (e.g. Your measurement is 34" so you would order a 34 1/2" rather than a 33 1/2"). Also note that an incorrect pinion angle will affect the length of driveline you need for your Bronco. Make sure the angle is correct before you measure for a new shaft.

1966-77 Ford Bronco Driveshaft Maintenance

Lack of maintenance is the number one cause of driveshaft failure. Driveshafts should be greased regularly, including the CV joint & splines. Most shafts will have a total of 5 grease fittings, so make sure you get them all. The grease fittings could be male or female style on the three u-joints and you will find the female style on the CV. You will need to use a needle attachment on a standard grease gun.

A rebuild kit will not fix a driveshaft that has worn-out splines and slip yoke. Prior to rebuilding your early Bronco driveline, inspect these parts to ensure they are in good condition.