Atlas II 3.8 Transfer Case – G2 Pro Series Left Drop (WOD Spec Configuration)
ATLAS38RC
The Atlas II G2 Pro Series Transfer Case configured to Wide Open Design specifications is a heavy-duty, gear-driven transfer case package selected for high-horsepower off-road, rock bouncing, competition, and extreme 4x4 applications. With a 3.8:1 low-range ratio, the Atlas II provides deeper torque multiplication and greater low-speed control while retaining a direct 1:1 high range for faster terrain and mixed off-road use.
The G2 Pro Series builds on the proven Atlas II two-speed platform with upgraded internal and output components intended for higher drivetrain loads and more aggressive use. This WOD-spec G2 Pro Series configuration is designed for builders who need greater strength than the Trail Series while also wanting the deeper 3.8:1 low-range ratio for technical rock crawling, steep climbs, controlled descents, and competition terrain.
For recreational trail riding, mixed-use vehicles, and builds that do not require the additional G2 Pro Series upgrades, see our WOD-spec Atlas 3.8 Trail Series transfer case.
WOD Spec Configuration:
- Atlas II G2 Pro Series 2-Speed Transfer Case
- 3.8:1 Low-Range Gear Ratio
- Upgraded 1.5" Idler Pin Assembly
- Heavy-Duty 32-Spline GM Input Gear
- Driver-Side / Left-Drop Configuration
- Short 300M Output Configuration
- 1410 Front & Rear U-Bolt Style Yokes
- Heavy-Duty 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 G2 Pro Series |
| WOD Configuration | Competition / Racing Off-Road |
| Type | 2-Speed Gear Driven |
| High Range | 1:1 |
| Low Range | 3.8:1 |
| Input | Heavy-Duty 32-Spline |
| Front Output | Left Drop |
| Tailhousing | Heavy-Duty Short Output Configuration |
| Driveline | 1410 Front & Rear U-Bolt Style |
| Shifter | Heavy-Duty Atlas Shift Assembly |
| Installation Package | Required Hardware & Gear Oil Included |
| Intended Use | Rock Bouncing, Racing, High-Horsepower & Extreme Off-Road |
Fitment
Designed for custom 4WD applications requiring:
- Heavy-Duty 32-Spline GM Transmission Input
- Driver-Side / Left-Drop Front Driveshaft
- 3.8:1 Low-Range Ratio
- 1410 Front and Rear Driveshaft Yokes
- Upgraded G2 Pro Series Drivetrain Components
Common Applications:
- Rock Bouncers
- Ultra4 and Off-Road Race Vehicles
- High-Horsepower Rock Crawlers
- Competition Tube Chassis Vehicles
- Large-Tire Off-Road Builds
- Extreme-Duty Custom 4x4s
Fitment Notes:
- This configuration uses a heavy-duty 32-spline GM input.
- Front output is left drop / driver side.
- Short output configuration does not provide a speedometer provision.
- Front and rear outputs are configured with 1410 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.
Tech Insight
What is the difference between the Atlas Trail Series and G2 Pro Series?
The Atlas Trail Series is intended for recreational off-road and mixed-use vehicles, while the G2 Pro Series uses upgraded heavy-duty components for racing, high-horsepower, and extreme-duty applications. The Pro Series is the better choice when drivetrain shock loads, tire size, horsepower, and competition use place greater demands on the transfer case.
Why choose the 3.8:1 G2 Pro instead of the 3.0:1 ratio?
A 3.8:1 low range provides deeper reduction, greater torque multiplication, and slower low-range vehicle speed than the 3.0:1 version. It is better suited for technical rock crawling, steep climbs, controlled descents, and applications where precise low-speed control is a priority. Transmission gearing, axle ratio, tire diameter, horsepower, and intended terrain should all be considered when selecting between the two.
Why choose the G2 Pro Series for a high-horsepower build?
High-horsepower vehicles, large tires, and aggressive terrain create substantial shock loads throughout the drivetrain. The G2 Pro Series is configured around upgraded components intended to better support those loads and provide additional durability in competition and extreme-duty applications.
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 under demanding off-road use.
What does the Atlas II 2-speed provide?
The Atlas II provides a direct 1:1 high range and a dedicated low range. This 3.8:1 version provides deeper drivetrain reduction in low range, giving the driver greater torque multiplication and control when the terrain becomes technical.
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.