Drivetrain & Transmission

Early Ford Bronco Differentials

At TOMS OFFROAD, we're your go-to destination for premium early Bronco differential components, whether you're seeking a custom-built Ford Bronco differential or the essentials for a DIY rebuild. Our rebuilt Ford 9-inch rear ends and Dana 44 front ends are crafted in-house by our skilled technicians, ensuring top-notch quality every time. 

Welcome to TOMS OFFROAD's collection of Differentials for the 1966-1977 Ford Bronco. Our range of differentials is designed to enhance the performance and durability of your classic Bronco. Whether you're upgrading for off-road capabilities or restoring your vehicle, our differentials provide the reliability and performance you need.

Collection Highlights

  • High-Performance Differentials: Designed for superior traction and handling in various driving conditions.
  • Durable Construction: Built from high-quality materials to withstand rugged off-road use.
  • Precision Engineering: Ensures a perfect fit and smooth operation.
  • Variety of Options: Includes both front and rear differentials to suit your specific needs.
  • Enhanced Off-Road Capability: Improves your Bronco’s ability to tackle tough terrains.

High-Quality Parts

At TOMS OFFROAD, our differentials are of the highest quality. Trust TOMS OFFROAD for parts that meet the demands of your classic Bronco.

Usage Tips and Recommendations

  • Installation: Follow the provided instructions for proper installation. Consider professional installation for optimal results.
  • Maintenance: Regularly check and replace differential fluid to maintain performance.
  • Complementary Products: Pair with our axle and suspension upgrades for a complete off-road enhancement.

Why Choose TOMS OFFROAD Differentials

Expertise: Decades of experience in the Bronco aftermarket industry.
Quality Assurance: Rigorous quality control measures for all parts.
Customer Service: Dedicated support team ready to assist.
Trusted Brand: We are known for quality and reliability in the Bronco community.

Frequently Asked Questions

What front axle does the early Ford Bronco use?

The 1966–1977 early Ford Bronco came standard with a Dana 30 front axle from 1966-1971. It's a solid front axle with a 2,500 lb capacity, well-suited to the Bronco's original light off-road use. In the later half of 1971, Ford Broncos came from the factory with the heavier duty Dana 44. Many performance and off-road builds upgrade to a Dana 44 (if they have a Dana 30) for added strength when running larger tires or more aggressive terrain.

What differential fluid does an early Ford Bronco use?

The Dana 30 and Dana 44 front axles in early Broncos use GL-5 80W-90 gear oil. If the axle is equipped with a limited-slip differential, a friction modifier additive is required alongside the gear oil to prevent chatter. Check and replace differential fluid every 30,000 miles or as part of any major drivetrain service.

What does the differential vent do on an early Bronco?

The differential vent tube allows pressure caused by heat expansion to escape the axle housing, preventing seal blowouts. On early Broncos used off-road, especially those crossing water, it's common to extend the vent tube up into the engine bay or firewall to prevent water from being sucked into the differential housing during water crossings.

Can I upgrade the early Bronco Dana 30 to a Dana 44?

Yes, swapping the Dana 30 for a Dana 44 front axle is a popular upgrade for early Broncos that see serious off-road use. The Dana 44 is stronger, supports larger ring and pinion gears, and accepts locking differential options. The swap requires compatible axle width measurement and new driveshaft length verification. Tom's Offroad carries Dana 44 components and rebuild parts.

How do I replace the axle seals on an early Bronco Dana 30?

Replacing Dana 30 axle seals involves removing the wheel, brake drum or rotor, and pulling the axle shaft. The outer seal is pressed into the knuckle and can be driven out with a seal driver. Inspect the axle bearing while the seal is out and replace it if there is roughness or play. Tom's Offroad carries Dana 30 seal and bearing kits for the early Bronco.

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