Atlas 2-Speed Transfer Case + Adapter | 6R80 10R80 4WD | 3.0:1 Ratio SKU: 8400

Early Bronco Atlas Transfer Case with 6R80 / 10R80 Adapter & Twin Stick

Take your Coyote-powered Bronco build to the next level with the Atlas 2-speed transfer case with adapter for Ford 6R80 and 10R80 automatic transmissions. Built by Advance Adapters and configured perfectly for Early Bronco swaps, this setup delivers the strength, control, and gearing needed to handle serious off-road use while still maintaining solid street manners.

This package includes the correct adapter housing to mate the Atlas to a 4WD 6R80 or 10R80 transmission, along with a twin stick shifter for precise control over front and rear output. The 3.0:1 low range ratio offers a balanced setup—low enough for technical terrain while still usable for mixed driving conditions.

• Fits 1966-77 Ford Bronco (Coyote / Modern Drivetrain Swaps) – Designed for builds running 6R80 or 10R80 automatic transmissions

• 6R80 / 10R80 Adapter Included – Direct bolt-up to 4WD versions of these transmissions

• 3.0:1 Low Range Ratio – Ideal balance of crawl capability and street usability

• Atlas 2-Speed Transfer Case – Proven gear-driven design for strength and reliability

• Twin Stick Shifter Included – Independent control of front and rear outputs

• Gear-Driven Design – Eliminates chains for increased durability under load

• Trail Series Configuration – Built for real-world off-road performance

• Upgradeable Options Available – Cable shifters and additional configurations available for additional cost. Please call

Why Choose the Atlas 2 for Your Bronco Build

The Atlas 2-speed transfer case has become the go-to choice for serious off-road builds, especially in Early Broncos running modern drivetrain swaps. Unlike factory chain-driven cases, the Atlas uses a gear-driven design, giving it significantly more strength and reliability under heavy load, large tires, and low gearing conditions.

With over 30,000 units in use, the Atlas has earned its reputation in everything from trail rigs to hardcore rock crawlers. It’s built to take abuse and keep moving.

3.0:1 Ratio – What It Means for Your Build

The 3.0:1 low range is one of the most versatile options available:

• Low enough for controlled crawling and technical terrain

• High enough to remain usable for trail driving without excessive RPM

• Ideal for Broncos that see both street and off-road use

This makes it a strong choice for builds that need performance across a wide range of conditions—not just extreme crawling.

Twin Stick Shifter Benefits

The included twin stick shifter allows you to:

• Independently control front and rear outputs

• Run front-wheel drive only (useful for tight maneuvering)

• Run rear-only or full 4WD depending on terrain

• Gain better control in technical situations

This level of control is a major upgrade over traditional single-stick transfer cases.

What’s Included

• Atlas 2-Speed Transfer Case (3.0:1 ratio)

• 6R80 / 10R80 Adapter Housing (4WD applications only)

• Twin Stick Shifter Assembly

Important Notes

• Designed for 4WD versions of 6R80 and 10R80 transmissions only

• Ideal for Coyote engine swap applications in Early Broncos

• Universal cable shifter option available separately

• Driveshaft modifications may be required depending on your setup

Built to perform, the Atlas with 6R80/10R80 adapter gives your Early Bronco the drivetrain strength to handle serious terrain without sacrificing road manners.