Atlas II 3.0 Transfer Case – Trail Series Left Drop (WOD Spec Configuration)
ATLAS30
The Atlas II Trail Series Transfer Case configured to Wide Open Design specifications is a gear-driven transfer case package selected for recreational off-road, rock crawling, trail, and custom 4x4 applications. With a 3.0:1 low-range ratio, the Atlas II provides additional torque multiplication and low-speed control for technical terrain while retaining a direct 1:1 high range for normal driving and higher-speed trail use.
The Trail Series uses the proven Atlas II two-speed design with a one-piece aluminum case, large helical-cut gears, precision-machined internal components, and independent front and rear output control. This WOD-spec Trail Series package is intended for recreational off-road and mixed-use vehicles. The 3.0:1 ratio provides a versatile balance for vehicles that see trail riding, technical rock crawling, and faster terrain without moving to an extremely deep low range.
For dedicated racing, high-horsepower, and extreme-duty applications, see our WOD-spec Atlas 3.0 G2 Pro Series transfer case.
WOD Spec Configuration:
- Atlas II Trail Series 2-Speed Transfer Case
- 3.0:1 Low-Range Gear Ratio
- 32-Spline GM Input Gear
- Driver-Side / Left-Drop Configuration
- Short Tailhousing Configuration
- (2) 1410 Front & Rear U-Bolt Style Yokes
- 5.5" Left/Right Atlas Shifter & Linkage
- Atlas 75W-90 GL4 Oil & Stud Kit
Have ordering questions? Call us and our team will be happy to help confirm fitment or place a custom order.
Specifications
| Specification | Details |
|---|---|
| Transfer Case | Atlas II Trail Series |
| WOD Configuration | Trail / Recreational Off-Road |
| Type | 2-Speed Gear Driven |
| High Range | 1:1 |
| Low Range | 3.0:1 |
| Input | 32-Spline |
| Front Output | Left Drop |
| Tailhousing | Short Trail Series |
| Driveline | 1410 Front & Rear U-Bolt Style |
| Shifter | Atlas II Left Shift Assembly |
| Installation Package | Required Hardware & Gear Oil Included |
| Intended Use | Rock Crawling, Trail & Mixed-Terrain Off-Road |
Fitment
Designed for custom 4WD applications requiring:
- 32-Spline GM Transmission Input
- Driver-Side / Left-Drop Front Driveshaft
- 3.0:1 Low-Range Ratio
- 1410 Front and Rear Driveshaft Yokes
Common Applications:
- Rock Crawlers
- Trail Rigs
- Custom Jeeps and 4x4s
- Tube Chassis Vehicles
- Large-Tire Off-Road Builds
- Mixed-Use Trail and Recreational Vehicles
Fitment Notes:
- This configuration uses a 32-spline GM input.
- Front output is left drop / driver side.
- Short tailhousing does not provide a speedometer provision.
- Front and rear outputs are configured with 1410 non-CV U-bolt-style yokes.
- Verify transmission output spline, adapter requirements, transfer-case drop, driveshaft configuration, and available chassis clearance before ordering.
- Custom drivetrain installations may require additional adapters, crossmembers, driveshaft modifications, or related installation components.
FAQ
What is the difference between the Atlas Trail Series and G2 Pro Series?
The Atlas Trail Series is designed for recreational off-road and mixed-use vehicles that need the strength, gearing, and control of an Atlas transfer case. The G2 Pro Series is intended for racing and more extreme-duty applications. Keeping the two series separate allows builders to choose the transfer case that better matches how the vehicle will actually be used.
Why choose the 3.0:1 Atlas instead of a deeper low-range ratio?
A 3.0:1 low range provides substantial additional gear reduction while maintaining a versatile overall crawl ratio. It is a strong choice for vehicles that need low-speed control in technical terrain but also spend time trail riding or operating at higher speeds. Final gearing should be considered with transmission ratios, axle gearing, tire diameter, engine characteristics, and intended use.
What is the advantage of a gear-driven transfer case?
A gear-driven transfer case eliminates the drive chain found in many factory transfer cases. The Atlas uses heavy-duty gearing and a rigid case design to provide high torque capacity, consistent power transfer, and durability for demanding off-road use.
What does the Atlas II 2-speed provide?
The Atlas II provides a 1:1 high range and a dedicated low range. This 3.0:1 version multiplies drivetrain reduction by three in low range, giving the driver significantly greater control and torque multiplication for technical terrain.
What maintenance does an Atlas transfer case require?
Change the gear oil after the initial 500 miles and then approximately every 10,000–15,000 miles. Use the manufacturer-recommended GL-4 synthetic gear oil and inspect fluid condition, yokes, fasteners, and related drivetrain components regularly. Yoke bolts should also be checked and retorqued at the recommended service intervals.