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Early Bronco Transmission
Early Bronco Transmission
The early Bronco came from Ford with either a 3-speed manual transmission or a Ford C4 3-speed automatic transmission. The automatic transmission was only offered in 73-77 Ford Broncos and did not have an overdrive gear. We offer a variety of parts to rebuild your factory early Bronco transmission or upgrade to a modern 4-speed or 5-speed manual transmission or automatic transmission with overdrive.| Transmission Gear Ratios | |||||
| 1st | 2nd | 3nd | 4th | 5th | |
| RAT 3 speed | 3.41 | 1.86 | 1.00 | ||
| RAN 3 speed | 2.99 | 1.75 | 1.00 | ||
| NP 435 | 6.69 | 3.34 | 1.79 | 1.00 | |
| T 18 | 6.32 | 3.09 | 1.69 | 1.00 | |
| C 4 auto | 2.46 | 1.46 | 1.00 | ||
| AX15 5-Speed | 3.83 | 2.33 | 1.44 | 1.00 | .79 |
| NV 4500 | 5.61 | 3.04 | 1.67 | 1.00 | .73 |
| NV 3550 | 4.01 | 2.32 | 1.40 | 1.00 | .78 |
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Frequently Asked Questions
Are WILD HORSES 4x4 parts compatible with my 66–77 Ford Bronco?
Yes. WILD HORSES 4x4 carries every part you need to completely build or restore your 1966–77 Ford Bronco. Each component is carefully tested for fitment and quality to ensure proper compatibility across all early Bronco models.
Does WILD HORSES 4x4 specialize in Bronco restorations?
Absolutely. We specialize in full Bronco restorations and upgrades, offering premium-quality parts, assemblies, and technical support to help you build or restore your classic Ford Bronco with confidence.
What makes WILD HORSES 4x4 the Bronco off-road experts?
Our team lives and breathes Broncos. With decades of experience in early Bronco restoration, customization, and trail performance, WILD HORSES 4x4 is recognized as the Bronco off-road authority—trusted by enthusiasts across the country.
Can I return a Bronco part if it doesn’t fit or I change my mind?
Yes. If your part doesn’t fit or you need to make a return, we make the process simple. Returns are accepted within 30 days when items are in their original condition. Please review our complete policy on our Returned Merchandise & Refund Policy.
Does WILD HORSES 4x4 offer technical support for installations?
Yes. Our in-house tech team provides expert installation and troubleshooting support for every product we sell. Whether you’re working on a full restoration or a weekend upgrade, we’re here to help get your Bronco back on the road or trail fast.