1966-77 Ford Bronco Parts

66-77 Ford Bronco Drivetrain & Transmission

Get the essential parts you need to upgrade or restore your 66-77 Ford Bronco's drivetrain and transmission with TOMS OFFROAD. Whether you're looking for performance upgrades or original specs, this collection has got you covered.

Collection Highlights

  • Transmission Conversion Kits: Upgrade your Bronco with smoother gear transitions and improved driving experience with kits like the AX15 5-speed and C4 automatic conversion.
  • High-Performance Differentials: Ensure superior traction and control with ARB Air Lockers and custom Ford 9" rear ends.
  • Adapter Kits: Facilitate the installation of various transmissions such as the NV4500, providing flexibility in your drivetrain setup.

Highest Quality Parts

TOMS OFFROAD parts are manufactured to the highest standards using premium materials, ensuring durability and optimal performance under all driving conditions.


Usage Tips and Recommendations

Installation: Follow detailed guides provided for each part. Professional installation is recommended for complex components.

Complementary Products: Pair your drivetrain upgrades with high-performance brakes and axles for enhanced off-road capabilities.


Why Choose TOMS OFFROAD

TOMS OFFROAD is renowned for its dedication to quality, customer service, and expertise in Bronco parts. Their legacy of excellence ensures that you receive the best parts for your classic Bronco.


FAQs

What transmission options are available for the 66-77 Ford Bronco?

Options include NP435 4-speed, NV3500 & NV4500 5-speed manuals, and C4 automatic transmissions.


Are the custom complete Ford 9" rear ends ready to install?

Yes, they come fully assembled and ready for installation.


What is the benefit of using ARB Air Lockers?

ARB Air Lockers provide superior traction and control in off-road conditions.


Can I install these parts myself?

While some parts are DIY-friendly, professional installation is recommended for best results.


Do you offer technical support for installation?

Yes, TOMS OFFROAD provides expert technical support to assist with your installation needs.


At TOMS OFFROAD, we offer comprehensive support for all your Early Bronco drivetrain needs. Whether you’re building a daily driver or upgrading for enhanced performance, our skilled technicians provide expert guidance to help you make informed choices. We specialize in custom differentials for 66-77 Broncos and offer support for DIY projects with tailored solutions. Upgrading from a 3-speed manual or stock C4 automatic transmission? We offer a variety of options, including the robust NP435 4-speed manual and the AX15 5-Speed and adapter kits as well as upgrades to the Ford AOD and C6 automatic transmissions.


Additionally, we provide professional Dana 20 transfer case rebuilding services. Whether you need a rebuild for improved performance or restoration purposes, our team ensures your Dana 20 operates at peak efficiency. For those looking to enhance their Bronco’s performance further, we offer custom-built Dana 44 and Ford 9” axles to spec. Choose from a variety of options such as ring gear size, locker style, and axle configurations to suit any budget or off-road requirement. Count on TOMS OFFROAD for top-quality drivetrain solutions and expert service tailored to your Early Bronco’s specific needs.

Frequently Asked Questions

What years and models does TOMS OFFROAD carry parts for?

TOMS OFFROAD stocks parts for Early Ford Broncos (1966–1977), Full-Size Ford Broncos (1978–1996), the 6th Generation Ford Bronco (2021+), the Bronco Sport, and classic Ford F-Series Trucks ranging from 1953 to 1996. With over 4,000 parts in stock across all of these platforms, TOMS is a one-stop shop whether you're restoring a classic or upgrading a new build. Explore all vehicles →

How do I know if a part will fit my specific Bronco or truck?

Every product listing includes compatibility details and model year fitment information. You can also use the site search with your year and model to filter relevant parts. When in doubt, TOMS OFFROAD's expert team — enthusiasts themselves — can help confirm fitment by phone at (541) 779-1339 or email at info@tomsoffroad.com. Most of our staff have hands-on experience with these vehicles. Browse by vehicle year →

Does TOMS OFFROAD manufacture its own parts?

Yes. TOMS OFFROAD produces an in-house line called the Signature Series — parts designed with meticulous attention to detail specifically for Early Broncos. Their inventory includes both parts manufactured in-house and hand-picked components from reputable third-party suppliers, ensuring every product meets high standards for performance and reliability. Shop Signature Series →

Can I do a modern engine swap (like a Coyote 5.0) in my Early Bronco, and do you carry the parts for it?

Yes — this is one of the most popular Early Bronco builds. TOMS OFFROAD carries complete 5.0L Coyote Conversion Kits designed to fit 1966–1977 Broncos. Their tech resource library also answers the most common engine swap questions, covering multiple modern engine setups and the specific parts required for each scenario. Read the engine swap guide →

How fast does TOMS OFFROAD ship, and do you offer free shipping?

Most orders ship the same day to minimize downtime and help you get back to your Bronco restoration project faster. TOMS OFFROAD offers free shipping on orders over $5K across the entire catalog with no exceptions. Select items in the Always Free Shipping Collection ship free with no minimum order required. Flat rate shipping is available for oversized items like bumpers and roll bars. Full shipping program details →