Early Bronco NV3550 Transmission Swap Guide

The New Venture NV3550 5-speed overdrive transmission is a well-balanced option for Early Bronco owners looking for both trail capability and street-friendly performance. Rated at 300 ft-lbs at 7,200 GVW and weighing just 97 lbs, it offers a strong yet lightweight solution for 1966-77 Ford Bronco builds.

Performance & Driving Feel

The NV3550 is known for its smooth, less “truck-like” shifting compared to heavier-duty transmissions like the NV4500. It delivers a more responsive, sporty feel while still providing the strength needed for off-road use.

• 4.01:1 first gear for strong off-the-line acceleration and low-speed control

• Smooth, precise shifting for daily driving

• Overdrive (0.78:1 5th gear) for reduced highway RPM

Gear Ratios

• 1st: 4.01

• 2nd: 2.32

• 3rd: 1.40

• 4th: 1.00

• 5th: 0.78

Easy Fitment for Early Bronco

One of the biggest advantages of the Early Bronco NV3550 conversion is how well it fits:

• Overall length is within 1/4" of the stock 3-speed and adapter

• No driveshaft modifications required in most cases

With its combination of strength, smooth shifting, and overdrive capability, the NV3550 is a solid choice for Bronco owners who want a transmission that performs just as well on the road as it does on the trail.